$JEF
Jefferies Financial Group Inc. Stock $jef

$jef Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000009622321000009 Filed on January 29, 2021

Income Statement

Concept	2020 Q4	2020 Q3	2020 Q2
Revenue	$1.861B	$1.825B	$1.378B
YoY Change	68.23%	49.24%	-8.8%
Cost Of Revenue	$367.8M	$82.66M	$80.77M
YoY Change	-21.84%	-3.63%	0.44%
Gross Profit	$1.693B	$1.743B	$1.297B
YoY Change	124.37%	53.23%	-9.31%
Gross Profit Margin	90.98%	95.47%	94.14%
Selling, General & Admin	$1.206B	$998.5M	$847.6M
YoY Change	61.06%	39.53%	14.6%
% of Gross Profit	71.22%	57.29%	65.36%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$36.30M	$39.52M	$40.37M
YoY Change	-6.92%	-0.9%	9.73%
% of Gross Profit	2.14%	2.27%	3.11%
Operating Expenses	$1.245B	$1.038B	$887.9M
YoY Change	57.4%	37.41%	14.35%
Operating Profit	$448.2M	$704.7M	$408.9M
YoY Change	-1334.71%	84.54%	-37.43%
Interest Expense	-$26.60M	$21.51M	$21.16M
YoY Change	-141.69%	-9.09%	-8.55%
% of Operating Profit	-5.93%	3.05%	5.18%
Other Income/Expense, Net
YoY Change
Pretax Income	$421.5M	$412.2M	$75.51M
YoY Change	81.29%	3008.21%	-58.85%
Income Tax	$113.5M	$107.4M	$31.96M
% Of Pretax Income	26.93%	26.05%	42.33%
Net Earnings	$307.3M	$304.4M	$44.92M
YoY Change	57.14%	527.95%	-93.3%
Net Earnings / Revenue	16.51%	16.68%	3.26%
Basic Earnings Per Share	$1.12	$1.08	$0.16
Diluted Earnings Per Share	$1.11	$1.07	$0.16
COMMON SHARES
Basic Shares Outstanding	272.9M shares	280.7M shares	286.8M shares
Diluted Shares Outstanding	277.3M shares	285.1M shares	286.8M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2020 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$9.055B	$8.427B	$6.884B
YoY Change	17.92%	40.19%	27.62%
Cash & Equivalents	$9.055B	$8.427B	$6.884B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$15.66B	$13.46B	$13.42B
YoY Change	16.7%	13.68%	9.09%
LONG-TERM ASSETS
Property, Plant & Equipment	$897.0M	$916.0M	$918.0M
YoY Change	132.97%
Goodwill	$1.746B	$1.743B	$1.736B
YoY Change	0.36%	0.49%	2.07%
Intangibles	$167.2M	$171.1M	$173.7M
YoY Change	-8.64%	-8.41%	-4.36%
Long-Term Investments	$1.687B	$1.539B	$1.560B
YoY Change	2.03%	-34.39%	-35.44%
Other Assets	$604.0M	$986.0M	$669.0M
YoY Change	-52.03%	-15.58%	-34.09%
Total Long-Term Assets	$37.45B	$38.32B	$36.86B
YoY Change	3.93%	2.38%	1.77%
TOTAL ASSETS
Total Short-Term Assets	$15.66B	$13.46B	$13.42B
Total Long-Term Assets	$37.45B	$38.32B	$36.86B
Total Assets	$53.12B	$51.77B	$50.28B
YoY Change	7.4%	5.1%	3.63%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$10.39B	$8.793B	$8.525B
YoY Change	27.01%	19.62%	21.28%
Accrued Expenses	$584.0M	$598.0M	$597.0M
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$764.7M	$805.4M	$656.9M
YoY Change	39.42%	55.21%	28.69%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$21.87B	$19.39B	$20.36B
YoY Change	23.1%	6.01%	8.71%
LONG-TERM LIABILITIES
Long-Term Debt	$11.77B	$11.92B	$10.89B
YoY Change	2.02%	12.44%	11.3%
Other Long-Term Liabilities	$10.02B	$11.00B	$9.646B
YoY Change	-4.88%	6.79%	-4.62%
Total Long-Term Liabilities	$21.78B	$22.92B	$20.54B
YoY Change	-1.27%	9.66%	3.21%
TOTAL LIABILITIES
Total Short-Term Liabilities	$21.87B	$19.39B	$20.36B
Total Long-Term Liabilities	$21.78B	$22.92B	$20.54B
Total Liabilities	$43.53B	$42.18B	$40.77B
YoY Change	9.63%	7.98%	5.9%
SHAREHOLDERS EQUITY
Retained Earnings	$6.532B	$6.265B	$6.002B
YoY Change	10.09%	0.15%	-3.92%
Common Stock	$3.161B	$3.342B	$3.459B
YoY Change	-19.35%	-17.09%	-10.15%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares	66.71M shares	57.22M shares	49.35M shares
Shareholders Equity	$9.404B	$9.411B	$9.327B
YoY Change
Total Liabilities & Shareholders Equity	$53.12B	$51.77B	$50.28B
YoY Change	7.4%	5.1%	3.63%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2020 Q2
OPERATING ACTIVITIES
Net Income	$307.3M	$304.4M	$44.92M
YoY Change	57.14%	527.95%	-93.3%
Depreciation, Depletion And Amortization	$36.30M	$39.52M	$40.37M
YoY Change	-6.92%	-0.9%	9.73%
Cash From Operating Activities	$768.0M	$1.147B	$1.079B
YoY Change	81.35%	506.5%	-264.4%
INVESTING ACTIVITIES
Capital Expenditures	-$30.60M	-$25.70M	-$59.70M
YoY Change	-55.0%	-58.35%	5.85%
Acquisitions
YoY Change
Other Investing Activities	$32.80M	$700.0K	-$54.40M
YoY Change	-95.12%	-101.84%	-129.5%
Cash From Investing Activities	$2.200M	-$25.00M	-$114.1M
YoY Change	-99.64%	-74.9%	-189.21%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-501.8M	747.7M	-653.2M
YoY Change	-166.54%	11.98%	-416.93%
NET CHANGE
Cash From Operating Activities	768.0M	1.147B	1.079B
Cash From Investing Activities	2.200M	-25.00M	-114.1M
Cash From Financing Activities	-501.8M	747.7M	-653.2M
Net Change In Cash	268.4M	1.870B	311.8M
YoY Change	-84.93%	146.91%	-196.71%
FREE CASH FLOW
Cash From Operating Activities	$768.0M	$1.147B	$1.079B
Capital Expenditures	-$30.60M	-$25.70M	-$59.70M
Free Cash Flow	$798.6M	$1.173B	$1.139B
YoY Change	62.48%	367.54%	-289.8%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000096223
CY2020	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201602Member
CY2020Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-11-30
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--11-30
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	1-5721
CY2020	dei	Entity Registrant Name EntityRegistrantName	JEFFERIES FINANCIAL GROUP INC.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NY
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	13-2615557
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	520 Madison Avenue
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	New York,
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10022
CY2020	dei	City Area Code CityAreaCode	212
CY2020	dei	Local Phone Number LocalPhoneNumber	460-1900
CY2020	dei	Security12b Title Security12bTitle	Common Shares, par value $1 per share
CY2020	dei	Trading Symbol TradingSymbol	JEF
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	3513705737	USD
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	251070970	shares
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	9055148000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	7678821000	USD
CY2020Q4	us-gaap	Cash And Securities Segregated Under Federal And Other Regulations CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations	604321000	USD
CY2019Q4	us-gaap	Cash And Securities Segregated Under Federal And Other Regulations CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations	796797000	USD
CY2020Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	13065585000	USD
CY2019Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	12058522000	USD
CY2020Q4	us-gaap	Financial Instruments Owned At Fair Value FinancialInstrumentsOwnedAtFairValue	18124577000	USD
CY2019Q4	us-gaap	Financial Instruments Owned At Fair Value FinancialInstrumentsOwnedAtFairValue	16895741000	USD
CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	1686563000	USD
CY2019Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	1652957000	USD
CY2020Q4	us-gaap	Securities Borrowed SecuritiesBorrowed	6934762000	USD
CY2019Q4	us-gaap	Securities Borrowed SecuritiesBorrowed	7624642000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	5096769000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	4299598000	USD
CY2020Q4	us-gaap	Securities Received As Collateral SecuritiesReceivedAsCollateral	7517000	USD
CY2019Q4	us-gaap	Securities Received As Collateral SecuritiesReceivedAsCollateral	9500000	USD
CY2020Q4	jef	Receivables Receivables	6608767000	USD
CY2019Q4	jef	Receivables Receivables	5744106000	USD
CY2020Q4	jef	Property Plant And Equipment And Operating Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	897204000	USD
CY2019Q4	jef	Property Plant And Equipment And Operating Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	385029000	USD
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	1913467000	USD
CY2019Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	1922934000	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	2189257000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	2450109000	USD
CY2020Q4	us-gaap	Assets Assets	53118352000	USD
CY2019Q4	us-gaap	Assets Assets	49460234000	USD
CY2020Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	764715000	USD
CY2019Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	548490000	USD
CY2020Q4	us-gaap	Financial Instruments Sold Not Yet Purchased At Fair Value FinancialInstrumentsSoldNotYetPurchasedAtFairValue	10017600000	USD
CY2019Q4	us-gaap	Financial Instruments Sold Not Yet Purchased At Fair Value FinancialInstrumentsSoldNotYetPurchasedAtFairValue	10532460000	USD
CY2020Q4	us-gaap	Securities Loaned SecuritiesLoaned	1810748000	USD
CY2019Q4	us-gaap	Securities Loaned SecuritiesLoaned	1525140000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	8316269000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	7504670000	USD
CY2020Q4	us-gaap	Other Secured Financings OtherSecuredFinancings	3288384000	USD
CY2019Q4	us-gaap	Other Secured Financings OtherSecuredFinancings	3070611000	USD
CY2020Q4	us-gaap	Obligation To Return Securities Received As Collateral ObligationToReturnSecuritiesReceivedAsCollateral	7517000	USD
CY2019Q4	us-gaap	Obligation To Return Securities Received As Collateral ObligationToReturnSecuritiesReceivedAsCollateral	9500000	USD
CY2020Q4	jef	Operating Lease And Finance Lease Liability OperatingLeaseAndFinanceLeaseLiability	584807000	USD
CY2019Q4	jef	Operating Lease And Finance Lease Liability OperatingLeaseAndFinanceLeaseLiability	0	USD
CY2020Q4	jef	Payables Expense Accruals And Other Liabilities PayablesExpenseAccrualsAndOtherLiabilities	10388072000	USD
CY2019Q4	jef	Payables Expense Accruals And Other Liabilities PayablesExpenseAccrualsAndOtherLiabilities	8179013000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	8352039000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	8337061000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	43530151000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	39706945000	USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	24676000	USD
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	26605000	USD
CY2020Q4	jef	Mandatorily Redeemable Convertible Preferred Shares MandatorilyRedeemableConvertiblePreferredShares	125000000	USD
CY2019Q4	jef	Mandatorily Redeemable Convertible Preferred Shares MandatorilyRedeemableConvertiblePreferredShares	125000000	USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	600000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	600000000	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	249750542	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	291644153	shares
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	66712070	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	24818459	shares
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	249751000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	291644000	USD
CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2911223000	USD
CY2019Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	3627711000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-288917000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-273039000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	6531836000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	5933389000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	9403893000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	9579705000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	34632000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	21979000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9438525000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9601684000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	53118352000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	49460234000	USD
CY2020	us-gaap	Revenues Revenues	6955930000	USD
CY2019	us-gaap	Revenues Revenues	5358656000	USD
	us-gaap	Revenues Revenues	5009728000	USD
CY2020	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	6010874000	USD
CY2019	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	3892976000	USD
	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	3764034000	USD
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	2940863000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1824891000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1862782000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	338588000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	319641000	USD
	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	307071000	USD
CY2020	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	266592000	USD
CY2019	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	223140000	USD
	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	184210000	USD
CY2020	us-gaap	Interest Expense InterestExpense	84870000	USD
CY2019	us-gaap	Interest Expense InterestExpense	87177000	USD
	us-gaap	Interest Expense InterestExpense	89249000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	158439000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	152871000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	120317000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	1078956000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	1009643000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	961328000	USD
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	4868308000	USD
CY2019	us-gaap	Costs And Expenses CostsAndExpenses	3617363000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	3524957000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1142566000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	275613000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	239077000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-75483000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	202995000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	57023000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1067083000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	478608000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	296100000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	298673000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-483955000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19008000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	768410000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	962563000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	277092000	USD
CY2020	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Discontinued Operation During Phase Out Period DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod	0	USD
CY2019	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Discontinued Operation During Phase Out Period DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod	0	USD
	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Discontinued Operation During Phase Out Period DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod	47045000	USD
CY2020	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	0	USD
CY2019	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	0	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	130063000	USD
CY2020	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	0	USD
CY2019	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	0	USD
	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	229553000	USD
CY2020	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2019	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	643921000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	768410000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	962563000	USD
	us-gaap	Profit Loss ProfitLoss	1051076000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-5271000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-1847000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-12975000	USD
CY2020	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-1558000	USD
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-286000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	37263000	USD
CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	5634000	USD
CY2019	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	5103000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	4470000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	769605000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	959593000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1022318000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.68
CY2019	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	3.07
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.82
CY2020	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0
CY2019	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0.27
CY2020	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerBasicShare	0
CY2019	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerBasicShare	0
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerBasicShare	1.84
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.68
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.07
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.93
CY2020	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.65
CY2019	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	3.03
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.81
CY2020	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0
CY2019	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0.26
CY2020	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerDilutedShare	0
CY2019	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerDilutedShare	0
CY2019	us-gaap	Profit Loss ProfitLoss	962563000	USD
	us-gaap	Profit Loss ProfitLoss	1051076000	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerDilutedShare	1.83
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.65
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.03
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.90
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	769605000	USD
CY2019	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	959593000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	285475000	USD
CY2020	jef	Income Loss From Discontinued Operations Net Of Taxes Attributable To Parent IncomeLossFromDiscontinuedOperationsNetOfTaxesAttributableToParent	0	USD
CY2019	jef	Income Loss From Discontinued Operations Net Of Taxes Attributable To Parent IncomeLossFromDiscontinuedOperationsNetOfTaxesAttributableToParent	0	USD
	jef	Income Loss From Discontinued Operations Net Of Taxes Attributable To Parent IncomeLossFromDiscontinuedOperationsNetOfTaxesAttributableToParent	92922000	USD
CY2020	jef	Gain Loss On Disposal Of Discontinued Operations Net Of Tax Attributable To Parent GainLossOnDisposalOfDiscontinuedOperationsNetOfTaxAttributableToParent	0	USD
CY2019	jef	Gain Loss On Disposal Of Discontinued Operations Net Of Tax Attributable To Parent GainLossOnDisposalOfDiscontinuedOperationsNetOfTaxAttributableToParent	0	USD
	jef	Gain Loss On Disposal Of Discontinued Operations Net Of Tax Attributable To Parent GainLossOnDisposalOfDiscontinuedOperationsNetOfTaxAttributableToParent	643921000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	769605000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	959593000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1022318000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	768410000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	117000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	165000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-551000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	372000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	487000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1560000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-545054000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	37000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	543178000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	109000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	117000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	545219000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-588000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	372000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-542691000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1669000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	11392000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	1146000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	-11089000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	35991000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	544000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-71543000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax	-52000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax	-16000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	-149000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	20459000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	11392000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	1198000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-11073000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	35991000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	693000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-92002000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-16228000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-4653000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	9289000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-51865000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-13588000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	29620000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionTax	146000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionTax	-144000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionTax	311000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	397000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	-427000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	916000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Reclassification Adjustment Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterReclassificationAdjustmentTax	-16374000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Reclassification Adjustment Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterReclassificationAdjustmentTax	-4509000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Reclassification Adjustment Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterReclassificationAdjustmentTax	8978000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	-52262000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	-13161000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	28704000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	552000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	1608000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	161000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	470000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-161000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	552000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-470000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	1608000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	-970000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	-2473000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	-297000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	2851000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	7103000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	844000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-957000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-490000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-697000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	2872000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	1407000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	7349000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-13000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-1983000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	400000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-21000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	5696000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-6505000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-15878000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-561325000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-56854000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	752532000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	401238000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	994222000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-5271000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-1847000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-12975000	USD
CY2020	jef	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interests ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterests	-1558000	USD
CY2019	jef	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interests ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterests	-286000	USD
	jef	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interests ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterests	37263000	USD
CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	5634000	USD
CY2019	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	5103000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	4470000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	753727000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	398268000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	965464000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	768410000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	962563000	USD
	us-gaap	Profit Loss ProfitLoss	1051076000	USD
CY2020	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	0	USD
CY2019	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	0	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	1050582000	USD
CY2020	jef	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	64667000	USD
CY2019	jef	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	6391000	USD
	jef	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	236406000	USD
CY2020	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	0	USD
CY2019	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544583000	USD
	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	0	USD
CY2020	jef	Depreciationandamortizationofrealestatepropertyequipmentandleaseholdimprovements Depreciationandamortizationofrealestatepropertyequipmentandleaseholdimprovements	146185000	USD
CY2019	jef	Depreciationandamortizationofrealestatepropertyequipmentandleaseholdimprovements Depreciationandamortizationofrealestatepropertyequipmentandleaseholdimprovements	139708000	USD
	jef	Depreciationandamortizationofrealestatepropertyequipmentandleaseholdimprovements Depreciationandamortizationofrealestatepropertyequipmentandleaseholdimprovements	105156000	USD
CY2020	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	-3791000	USD
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	-9942000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	-37749000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	40038000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	49848000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	48249000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	48157000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	29800000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	35223000	USD
CY2020	jef	Income Losses Relatedto Associated Companies IncomeLossesRelatedtoAssociatedCompanies	-51549000	USD
CY2019	jef	Income Losses Relatedto Associated Companies IncomeLossesRelatedtoAssociatedCompanies	288164000	USD
	jef	Income Losses Relatedto Associated Companies IncomeLossesRelatedtoAssociatedCompanies	130685000	USD
CY2020	jef	Dividends Or Distributions From Associated Companies DividendsOrDistributionsFromAssociatedCompanies	64493000	USD
CY2019	jef	Dividends Or Distributions From Associated Companies DividendsOrDistributionsFromAssociatedCompanies	467157000	USD
	jef	Dividends Or Distributions From Associated Companies DividendsOrDistributionsFromAssociatedCompanies	162988000	USD
CY2020	jef	Netgainslossesrelatedtopropertyandequipmentandotherassets Netgainslossesrelatedtopropertyandequipmentandotherassets	-68946000	USD
CY2019	jef	Netgainslossesrelatedtopropertyandequipmentandotherassets Netgainslossesrelatedtopropertyandequipmentandotherassets	42214000	USD
	jef	Netgainslossesrelatedtopropertyandequipmentandotherassets Netgainslossesrelatedtopropertyandequipmentandotherassets	-32461000	USD
CY2020	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	0	USD
CY2019	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	210278000	USD
	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	221712000	USD
CY2020	jef	Increase Decreasein Securities Depositedwith Clearingand Depository Organizations IncreaseDecreaseinSecuritiesDepositedwithClearingandDepositoryOrganizations	-751000	USD
CY2019	jef	Increase Decreasein Securities Depositedwith Clearingand Depository Organizations IncreaseDecreaseinSecuritiesDepositedwithClearingandDepositoryOrganizations	169000	USD
	jef	Increase Decreasein Securities Depositedwith Clearingand Depository Organizations IncreaseDecreaseinSecuritiesDepositedwithClearingandDepositoryOrganizations	-64911000	USD
CY2020	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	1182091000	USD
CY2019	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-218419000	USD
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	1451472000	USD
CY2020	us-gaap	Increase Decrease In Securities Borrowed IncreaseDecreaseInSecuritiesBorrowed	-714664000	USD
CY2019	us-gaap	Increase Decrease In Securities Borrowed IncreaseDecreaseInSecuritiesBorrowed	1103708000	USD
	us-gaap	Increase Decrease In Securities Borrowed IncreaseDecreaseInSecuritiesBorrowed	-1137134000	USD
CY2020	jef	Increase Decrease In Securities Purchased Under Agreements To Resell IncreaseDecreaseInSecuritiesPurchasedUnderAgreementsToResell	752171000	USD
CY2019	jef	Increase Decrease In Securities Purchased Under Agreements To Resell IncreaseDecreaseInSecuritiesPurchasedUnderAgreementsToResell	1523222000	USD
	jef	Increase Decrease In Securities Purchased Under Agreements To Resell IncreaseDecreaseInSecuritiesPurchasedUnderAgreementsToResell	-807619000	USD
CY2020	us-gaap	Increase Decrease In Brokerage Receivables IncreaseDecreaseInBrokerageReceivables	1147886000	USD
CY2019	us-gaap	Increase Decrease In Brokerage Receivables IncreaseDecreaseInBrokerageReceivables	-211198000	USD
	us-gaap	Increase Decrease In Brokerage Receivables IncreaseDecreaseInBrokerageReceivables	602950000	USD
CY2020	jef	Increase Decrease Receivables From Customers Of Securities Operations IncreaseDecreaseReceivablesFromCustomersOfSecuritiesOperations	-185266000	USD
CY2019	jef	Increase Decrease Receivables From Customers Of Securities Operations IncreaseDecreaseReceivablesFromCustomersOfSecuritiesOperations	-524656000	USD
	jef	Increase Decrease Receivables From Customers Of Securities Operations IncreaseDecreaseReceivablesFromCustomersOfSecuritiesOperations	465960000	USD
CY2020	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	79253000	USD
CY2019	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	2283000	USD
	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-30864000	USD
CY2020	jef	Increase Decrease In Other Assets IncreaseDecreaseInOtherAssets	-97468000	USD
CY2019	jef	Increase Decrease In Other Assets IncreaseDecreaseInOtherAssets	-15705000	USD
	jef	Increase Decrease In Other Assets IncreaseDecreaseInOtherAssets	-33484000	USD
CY2020	us-gaap	Increase Decrease In Trading Liabilities IncreaseDecreaseInTradingLiabilities	-604591000	USD
CY2019	us-gaap	Increase Decrease In Trading Liabilities IncreaseDecreaseInTradingLiabilities	1051598000	USD
	us-gaap	Increase Decrease In Trading Liabilities IncreaseDecreaseInTradingLiabilities	1142878000	USD
CY2020	us-gaap	Increase Decrease In Securities Loaned Transactions IncreaseDecreaseInSecuritiesLoanedTransactions	270261000	USD
CY2019	us-gaap	Increase Decrease In Securities Loaned Transactions IncreaseDecreaseInSecuritiesLoanedTransactions	-301727000	USD
	us-gaap	Increase Decrease In Securities Loaned Transactions IncreaseDecreaseInSecuritiesLoanedTransactions	-964137000	USD
CY2020	us-gaap	Increase Decrease In Payables Under Repurchase Agreements IncreaseDecreaseInPayablesUnderRepurchaseAgreements	799794000	USD
CY2019	us-gaap	Increase Decrease In Payables Under Repurchase Agreements IncreaseDecreaseInPayablesUnderRepurchaseAgreements	-1122982000	USD
	us-gaap	Increase Decrease In Payables Under Repurchase Agreements IncreaseDecreaseInPayablesUnderRepurchaseAgreements	36956000	USD
CY2020	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	698873000	USD
CY2019	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	111757000	USD
	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	250603000	USD
CY2020	us-gaap	Increase Decrease In Payables To Customers IncreaseDecreaseInPayablesToCustomers	442913000	USD
CY2019	us-gaap	Increase Decrease In Payables To Customers IncreaseDecreaseInPayablesToCustomers	631854000	USD
	us-gaap	Increase Decrease In Payables To Customers IncreaseDecreaseInPayablesToCustomers	512760000	USD
CY2020	jef	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-52553000	USD
CY2020	jef	Increase Decreasein Trade Payables Expense Accrualsand Other Liabilities IncreaseDecreaseinTradePayablesExpenseAccrualsandOtherLiabilities	1179182000	USD
CY2019	jef	Increase Decreasein Trade Payables Expense Accrualsand Other Liabilities IncreaseDecreaseinTradePayablesExpenseAccrualsandOtherLiabilities	-160784000	USD
	jef	Increase Decreasein Trade Payables Expense Accrualsand Other Liabilities IncreaseDecreaseinTradePayablesExpenseAccrualsandOtherLiabilities	-112488000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-256667000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-61565000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	124580000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	2075948000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	-827837000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	526453000	USD
CY2020	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	0	USD
CY2019	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	0	USD
	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	164650000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2075948000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-827837000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	691103000	USD
CY2020	jef	Payments To Acquire Property Plant And Equipment And Other Assets PaymentsToAcquirePropertyPlantAndEquipmentAndOtherAssets	176958000	USD
CY2019	jef	Payments To Acquire Property Plant And Equipment And Other Assets PaymentsToAcquirePropertyPlantAndEquipmentAndOtherAssets	232229000	USD
	jef	Payments To Acquire Property Plant And Equipment And Other Assets PaymentsToAcquirePropertyPlantAndEquipmentAndOtherAssets	325666000	USD
CY2020	jef	Proceeds From Disposals Of Property And Equipment And Other Assets ProceedsFromDisposalsOfPropertyAndEquipmentAndOtherAssets	5121000	USD
CY2019	jef	Proceeds From Disposals Of Property And Equipment And Other Assets ProceedsFromDisposalsOfPropertyAndEquipmentAndOtherAssets	11302000	USD
	jef	Proceeds From Disposals Of Property And Equipment And Other Assets ProceedsFromDisposalsOfPropertyAndEquipmentAndOtherAssets	14052000	USD
CY2020	jef	Proceeds From Sale Of Subsidiary Net Of Expenses And Cash Of Operations Sold ProceedsFromSaleOfSubsidiaryNetOfExpensesAndCashOfOperationsSold	179654000	USD
CY2019	jef	Proceeds From Sale Of Subsidiary Net Of Expenses And Cash Of Operations Sold ProceedsFromSaleOfSubsidiaryNetOfExpensesAndCashOfOperationsSold	-546000	USD
	jef	Proceeds From Sale Of Subsidiary Net Of Expenses And Cash Of Operations Sold ProceedsFromSaleOfSubsidiaryNetOfExpensesAndCashOfOperationsSold	100000000	USD
CY2020	jef	Proceeds From Sale Of Associated Companies ProceedsFromSaleOfAssociatedCompanies	0	USD
CY2019	jef	Proceeds From Sale Of Associated Companies ProceedsFromSaleOfAssociatedCompanies	790612000	USD
	jef	Proceeds From Sale Of Associated Companies ProceedsFromSaleOfAssociatedCompanies	379074000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-100723000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2020	us-gaap	Payments To Acquire Receivables PaymentsToAcquireReceivables	813867000	USD
CY2019	us-gaap	Payments To Acquire Receivables PaymentsToAcquireReceivables	570659000	USD
	us-gaap	Payments To Acquire Receivables PaymentsToAcquireReceivables	351831000	USD
CY2020	us-gaap	Proceeds From Sale And Collection Of Other Receivables ProceedsFromSaleAndCollectionOfOtherReceivables	686114000	USD
CY2019	us-gaap	Proceeds From Sale And Collection Of Other Receivables ProceedsFromSaleAndCollectionOfOtherReceivables	323215000	USD
	us-gaap	Proceeds From Sale And Collection Of Other Receivables ProceedsFromSaleAndCollectionOfOtherReceivables	216426000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	46335000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	0	USD
	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	0	USD
CY2020	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	1690644000	USD
CY2019	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	267263000	USD
	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	1956983000	USD
CY2020	jef	Capital Distributions And Loan Repayment From Associated Companies CapitalDistributionsAndLoanRepaymentFromAssociatedCompanies	1555973000	USD
CY2019	jef	Capital Distributions And Loan Repayment From Associated Companies CapitalDistributionsAndLoanRepaymentFromAssociatedCompanies	110656000	USD
	jef	Capital Distributions And Loan Repayment From Associated Companies CapitalDistributionsAndLoanRepaymentFromAssociatedCompanies	1973739000	USD
CY2020	jef	Purchases Of Investments Other Than Short Term PurchasesOfInvestmentsOtherThanShortTerm	906000	USD
CY2019	jef	Purchases Of Investments Other Than Short Term PurchasesOfInvestmentsOtherThanShortTerm	2995000	USD
	jef	Purchases Of Investments Other Than Short Term PurchasesOfInvestmentsOtherThanShortTerm	3423191000	USD
CY2020	jef	Proceeds From Maturities Of Investments ProceedsFromMaturitiesOfInvestments	2525000	USD
CY2019	jef	Proceeds From Maturities Of Investments ProceedsFromMaturitiesOfInvestments	531104000	USD
	jef	Proceeds From Maturities Of Investments ProceedsFromMaturitiesOfInvestments	1084277000	USD
CY2020	jef	Proceeds From Sales Of Investments ProceedsFromSalesOfInvestments	20461000	USD
CY2019	jef	Proceeds From Sales Of Investments ProceedsFromSalesOfInvestments	913175000	USD
	jef	Proceeds From Sales Of Investments ProceedsFromSalesOfInvestments	1571507000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-130000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.50
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	158302000	USD
CY2019	jef	Proceeds From Other Secured Financings Net ProceedsFromOtherSecuredFinancingsNet	1533696000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-186192000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	1707095000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-718466000	USD
CY2020	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	0	USD
CY2019	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	0	USD
	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	860909000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-186192000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	1707095000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	142443000	USD
CY2020	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	3136513000	USD
CY2019	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	3275800000	USD
	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	2754665000	USD
CY2020	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	3084531000	USD
CY2019	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	2588791000	USD
	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	2678323000	USD
CY2020	jef	Proceeds From Other Secured Financings Net ProceedsFromOtherSecuredFinancingsNet	218010000	USD
	jef	Proceeds From Other Secured Financings Net ProceedsFromOtherSecuredFinancingsNet	503043000	USD
CY2020	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	-34663000	USD
CY2019	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	26568000	USD
	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	10290000	USD
CY2020	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	1694000	USD
CY2019	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	5293000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	7408000	USD
CY2020	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	19617000	USD
CY2019	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	6829000	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	113000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	816871000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	509914000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1130854000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	160940000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	149647000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	151758000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	1034000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	330000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	4067000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-723525000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	1589578000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-696165000	USD
CY2020	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	0	USD
CY2019	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	0	USD
	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	120322000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-723525000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1589578000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-575843000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	18306000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1063000	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-19546000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1184537000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	2467773000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	238157000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8480435000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6012662000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	5774505000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9664972000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8480435000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6012662000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	9055148000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	7678821000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5258809000	USD
CY2020Q4	jef	Cash And Securities Segregated And On Deposit For Regulatory Purposes Or Deposited With Clearing And Depository Organizations CashAndSecuritiesSegregatedAndOnDepositForRegulatoryPurposesOrDepositedWithClearingAndDepositoryOrganizations	570084000	USD
CY2019Q4	jef	Cash And Securities Segregated And On Deposit For Regulatory Purposes Or Deposited With Clearing And Depository Organizations CashAndSecuritiesSegregatedAndOnDepositForRegulatoryPurposesOrDepositedWithClearingAndDepositoryOrganizations	761809000	USD
CY2018Q4	jef	Cash And Securities Segregated And On Deposit For Regulatory Purposes Or Deposited With Clearing And Depository Organizations CashAndSecuritiesSegregatedAndOnDepositForRegulatoryPurposesOrDepositedWithClearingAndDepositoryOrganizations	673141000	USD
CY2020Q4	jef	Restricted Cash Other Assets RestrictedCashOtherAssets	39740000	USD
CY2019Q4	jef	Restricted Cash Other Assets RestrictedCashOtherAssets	39805000	USD
CY2018Q4	jef	Restricted Cash Other Assets RestrictedCashOtherAssets	80712000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9664972000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8480435000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6012662000	USD
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10138979000	USD
	jef	Net Income Loss Available To Common Stockholders NetIncomeLossAvailableToCommonStockholders	1022318000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-12975000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-56854000	USD
	jef	Reversal Of Cumulative Redeemable Noncontrolling Interests Fair Value Adjustments Prior To Deconsolidation ReversalOfCumulativeRedeemableNoncontrollingInterestsFairValueAdjustmentsPriorToDeconsolidation	237669000	USD
	jef	Minority Interest Increase From Contributions To Parent MinorityInterestIncreaseFromContributionsToParent	113000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	7408000	USD
	jef	Consolidation Of Asset Management Entity ConsolidationOfAssetManagementEntity	8316000	USD
	us-gaap	Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Changes Net ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet	0	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	48249000	USD
	jef	Change In Fair Value Of Redeemable Noncontrolling Interests ChangeInFairValueOfRedeemableNoncontrollingInterests	-26551000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2485000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1148422000	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.45
	us-gaap	Dividends Common Stock DividendsCommonStock	158464000	USD
	us-gaap	Stockholders Equity Other StockholdersEquityOther	-13990000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10079257000	USD
CY2019	jef	Net Income Loss Available To Common Stockholders NetIncomeLossAvailableToCommonStockholders	959593000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-1847000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-561325000	USD
CY2019	jef	Minority Interest Increase From Contributions To Parent MinorityInterestIncreaseFromContributionsToParent	6829000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	5293000	USD
CY2019	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	181780000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	49848000	USD
CY2019	jef	Change In Fair Value Of Redeemable Noncontrolling Interests ChangeInFairValueOfRedeemableNoncontrollingInterests	-1213000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	509970000	USD
CY2019	us-gaap	Stockholders Equity Other StockholdersEquityOther	-13421000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9601684000	USD
CY2020	jef	Net Income Loss Available To Common Stockholders NetIncomeLossAvailableToCommonStockholders	769605000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-5271000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-15878000	USD
CY2020	jef	Minority Interest Increase From Contributions To Parent MinorityInterestIncreaseFromContributionsToParent	19617000	USD
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	1694000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	40038000	USD
CY2020	jef	Change In Fair Value Of Redeemable Noncontrolling Interests ChangeInFairValueOfRedeemableNoncontrollingInterests	3056000	USD
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	815656000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	171158000	USD
CY2020	us-gaap	Stockholders Equity Other StockholdersEquityOther	-14182000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9438525000	USD
CY2020	us-gaap	Nature Of Operations NatureOfOperations	Nature of Operations<div style="margin-bottom:8pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Jefferies Financial Group Inc. ("Jefferies," "we," "our" or the "Company") is engaged in investment banking and capital markets, asset management and direct investing. Jefferies Group LLC ("Jefferies Group"), our largest subsidiary, was established in 1962 and is now the largest independent full-service global investment banking firm headquartered in the U.S. </span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In the fourth quarter of 2018, we changed our fiscal year end from a calendar year basis to a fiscal year ending on November 30, consistent with the fiscal year of Jefferies Group. Our 2018 fiscal year consists of the eleven month transition period beginning January 1, 2018 through November 30, 2018. Jefferies Group has a November 30 year end. Prior to the fourth quarter of 2018, because our fiscal year end was December 31, we reflected Jefferies Group in our consolidated financial statements utilizing a one month lag. In connection with our change in fiscal year end to November 30, we eliminated the one month lag utilized to reflect Jefferies Group results beginning with the fourth quarter of 2018. Therefore, our results for the eleven months ended November 30, 2018, include twelve month results for Jefferies Group and eleven months for the remainder of our results.</span></div><div style="text-align:justify"><span><br/></span></div><div style="margin-bottom:8pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Jefferies Group operates in two business segments: Investment Banking and Capital Markets, and Asset Management. Investment Banking and Capital Markets includes investment banking, capital markets and other related services. Investment banking provides underwriting and financial advisory services to clients across most industry sectors in the Americas, Europe and Asia. Capital markets businesses operate across the spectrum of equities, fixed income and foreign exchange products. Related services include, among other things, prime brokerage and equity finance, research and strategy, corporate lending and real estate finance.</span></div><div style="margin-bottom:8pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Through Jefferies Group, we own 50% of Jefferies Finance LLC ("Jefferies Finance"), Jefferies Group's joint venture with Massachusetts Mutual Life Insurance Company ("MassMutual"). Jefferies Finance is a commercial finance company that structures, underwrites and arranges primarily senior secured loans to corporate borrowers. Loans are originated primarily through the investment banking efforts of Jefferies LLC. Jefferies Finance may also underwrite and arrange other debt products such as second lien term, bridge and mezzanine loans, as well as related equity co-investments. Through Jefferies Group, we also have an interest in Berkadia Commercial Mortgage Holding LLC ("Berkadia"), Jefferies Group's 50-50 equity method joint venture with Berkshire Hathaway Inc. Berkadia is a U.S. commercial real estate finance company providing capital solutions, investment sales advisory and mortgage servicing for multifamily and commercial properties.</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our Asset Management segment includes both the operations of Leucadia Asset Management ("LAM") as well as the asset management operations within Jefferies Group. Within Asset Management, we manage, invest in and provide services to a diverse group of alternative asset management platforms across a spectrum of investment strategies and asset classes. Asset Management offers institutional clients an innovative range of investment strategies through its affiliated managers.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Merchant Banking is where we own a portfolio of businesses and investments including Linkem (fixed wireless broadband services in Italy); Vitesse Energy, LLC ("Vitesse Energy Finance") and JETX Energy, LLC ("JETX Energy") (oil and gas production and development); real estate, primarily HomeFed LLC ("HomeFed"); Idaho Timber (manufacturing) and FXCM Group, LLC ("FXCM") (provider of online foreign exchange trading services). Our Merchant Banking businesses and investments also included National Beef Packing Company, LLC ("National Beef") (beef processing), prior to its sale in November 2019;</span><span style="color:#ff0000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Spectrum Brands Holdings, Inc. ("Spectrum Brands") (consumer products), prior to its distribution to shareholders in October 2019; Berkadia (commercial mortgage banking, investment sales and servicing), prior to its transfer to Jefferies Group in the fourth quarter of 2018; and Garcadia (automobile dealerships), prior to its sale in August 2018. The structure of each of our investments was tailored to the unique opportunity each transaction presented. Our investments may be reflected in our consolidated results as consolidated subsidiaries, equity investments, securities or in other ways, depending on the structure of our specific holdings.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On June 5, 2018, we completed the sale of 48% of National Beef to Marfrig Global Foods S.A. ("Marfrig"), reducing our then ownership in National Beef from 79% to 31%. As of the closing of the sale on June 5, 2018, we deconsolidated our investment in National Beef and accounted for our remaining 31% interest in National Beef under the equity method of accounting. We classified the results of National Beef prior to June 5, 2018 as discontinued operations in the Consolidated Statements of Operations. See Note 26 for more information. On November 29, 2019, we sold our remaining 31% equity interest in National Beef to Marfrig and other shareholders and received a total of $970.0 million in cash, including $790.6 million of proceeds and $179.4 million from final distributions from National Beef around the time of the sale. The pre-tax gain recognized as a result of this transaction, $205.0 million for the twelve months ended November 30, 2019, is classified as Other revenue. As of November 30, 2019, we no longer hold an equity interest in National Beef.</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Prior to October 11, 2019, we owned approximately 15% of Spectrum Brands, a publicly traded global consumer products company on the NYSE (NYSE: SPB), and we reflected this investment at fair value based on quoted market prices. We distributed all of our 7,514,477 Spectrum Brands shares through a special pro rata dividend effective on October 11, 2019 to our stockholders of record as of the close of business on September 30, 2019. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We own approximately 42% of the common shares of Linkem, as well as convertible preferred shares and warrants. If all of our convertible preferred stock was converted and warrants exercised, it would increase our ownership to approximately 56% of Linkem's common equity at November 30, 2020. Linkem provides residential broadband services in Italy using LTE technologies deployed over the 3.5 GHz spectrum band. Linkem launched its first 5G towers in late 2020 and plans to rapidly increase its network coverage and service offerings over the coming years as it upgrades to 5G, adds subscribers and leverages its assets. Linkem is accounted for under the equity method. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Vitesse Energy Finance is our 97% owned consolidated subsidiary that acquires, invests and monetizes non-operated working interests and royalties predominantly in the Bakken Shale oil field in North Dakota. JETX Energy is our 98% owned consolidated subsidiary that currently has non-operated working interests and acreage in east Texas.</span></div><div style="margin-bottom:12pt;margin-top:12pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">HomeFed is our 100% owned consolidated subsidiary that owns and develops residential and mixed use real estate properties. Prior to July 1, 2019, we owned approximately 70% of HomeFed and accounted for it under the equity method. On July 1, 2019, we completed a merger with HomeFed by which we acquired the remaining common stock of HomeFed. From July 1, 2019, the results of HomeFed are reflected on a consolidated basis. In connection with the merger, HomeFed stockholders received two shares of our common stock for each share of HomeFed common stock. A total of 9.3 million shares were issued, which were valued at $178.8 million at closing based on the market price of our common shares. As an offset to these issued shares, our Board of Directors authorized the repurchase of an additional 9.25 million shares in the open market.</span></div><div style="margin-bottom:12pt;margin-top:12pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The HomeFed acquisition was accounted for as a business combination. The fair value of the shares issued to acquire the remaining common shares of HomeFed implied an aggregate fair value of $596.4 million for 100% of HomeFed's equity balance. In accordance with purchase accounting, we allocated the $596.4 million fair value for 100% of HomeFed to its assets, liabilities and noncontrolling interests. We recorded $101.7 million of cash, $413.2 million of real estate, $198.3 million of investments in associated companies, $37.4 million of deferred tax assets, $15.3 million of goodwill and intangibles, $6.6 million of other assets, $125.5 million of long-term debt, $46.7 million of payables, expense accruals and other liabilities and $3.9 million of noncontrolling interests. In addition, associated with the acquisition, we also recorded $32.4 million of goodwill generated by the establishment of $32.4 million of deferred tax liabilities related to allocated value exceeding the tax basis of some of the HomeFed net assets. The estimated weighted average useful lives for the amortizable intangibles were 4 years at time of acquisition. Our allocation of the acquisition price is based on our estimate of fair value for each of the acquired assets and liabilities, which were developed primarily utilizing discounted cash flow models. In connection with the acquisition of the remaining interest of HomeFed, we recognized a $72.1 million non-cash pre-tax gain in Other revenues on the revaluation of our 70% interest in HomeFed to fair value. The fair value of our 70% interest in HomeFed was based on the implied $596.4 million equity value for 100% of HomeFed.</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Idaho Timber is our 100% owned consolidated subsidiary engaged in the manufacture and distribution of various wood products.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our investment in FXCM and associated companies consists of a senior secured term loan due February 15, 2022 ($71.6 million principal outstanding at November 30, 2020), a 50% voting interest in FXCM and rights to a majority of all distributions in respect of the equity of FXCM.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Garcadia was an equity method joint venture that owned and operated automobile dealerships. During the third quarter of 2018, we sold our equity interests in Garcadia and our associated real estate to our former partners, the Garff family, for $417.2 million in cash. The pre-tax gain recognized as a result of this transaction, $221.7 million during the third quarter of 2018, is classified as Other revenue.</span></div>
CY2019Q3	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	9250000	shares
CY2020Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	4161800000	USD
CY2019Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	3011000000.0	USD
CY2020Q4	us-gaap	Receivables From Customers ReceivablesFromCustomers	1286900000	USD
CY2019Q4	us-gaap	Receivables From Customers ReceivablesFromCustomers	1490900000	USD
CY2020	us-gaap	Derivatives Methods Of Accounting Hedging Derivatives DerivativesMethodsOfAccountingHedgingDerivatives	<div style="margin-bottom:12pt;margin-top:12pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Hedge Accounting</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Hedge accounting is applied using interest rate swaps designated as fair value hedges of changes in the benchmark interest rate of fixed rate senior long-term debt. The interest rate swaps are included as derivative contracts in Financial instruments owned, at fair value and Financial instruments sold, not yet purchased, at fair value in the Consolidated Statements of Financial Condition. We use regression analysis to perform ongoing prospective and retrospective assessments of the effectiveness of these hedging relationships. A hedging relationship is deemed effective if the change in fair value of the interest rate swap and the change in the fair value of the long-term debt due to changes in the benchmark interest rate offset within a range of 80% to 125%. The impact of valuation adjustments related to Jefferies Group's own credit spreads and counterparty credit spreads are included in the assessment of effectiveness.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For qualifying fair value hedges of benchmark interest rates, the change in the fair value of the derivative and the change in fair value of the long-term debt provide offset of one another and, together with any resulting ineffectiveness, are recorded in Interest expense. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%">We seek to reduce the impact of fluctuations in foreign exchange rates on our net investments in certain non-U.S. operations through the use of foreign exchange contracts. The foreign exchange contracts are included as derivative contracts in Financial instruments owned, at fair value and Financial instruments sold, not yet purchased, at fair value in the Consolidated Statements of Financial Condition. For foreign exchange contracts designated as hedges, the effectiveness of the hedge is assessed based on the overall changes in the fair value of the forward contracts (</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:115%">i.e.</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%">, based on changes in forward rates). For qualifying net investment hedges, all gains or losses on the hedging instruments are included in Accumulated other comprehensive income (loss).</span></div>
CY2020Q4	jef	Other Investments Carrying Value OtherInvestmentsCarryingValue	90200000	USD
CY2019Q4	jef	Other Investments Carrying Value OtherInvestmentsCarryingValue	172800000	USD
CY2020	us-gaap	Impairment Of Investments ImpairmentOfInvestments	20400000	USD
CY2019	us-gaap	Impairment Of Investments ImpairmentOfInvestments	5500000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	200000	USD
CY2020	us-gaap	Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss DebtAndEquitySecuritiesGainLossExcludingOtherThanTemporaryImpairmentLoss	2100000	USD
CY2019	us-gaap	Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss DebtAndEquitySecuritiesGainLossExcludingOtherThanTemporaryImpairmentLoss	13800000	USD
	us-gaap	Debt And Equity Securities Gain Loss Excluding Other Than Temporary Impairment Loss DebtAndEquitySecuritiesGainLossExcludingOtherThanTemporaryImpairmentLoss	200000	USD
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	8600000	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	6200000	USD
CY2020Q4	srt	Payables To Broker Dealers And Clearing Organizations PayablesToBrokerDealersAndClearingOrganizations	3325800000	USD
CY2019Q4	srt	Payables To Broker Dealers And Clearing Organizations PayablesToBrokerDealersAndClearingOrganizations	2621700000	USD
CY2020Q4	srt	Payables To Customers PayablesToCustomers	4249700000	USD
CY2019Q4	srt	Payables To Customers PayablesToCustomers	3808600000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	1080368000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	1563152000	USD
	us-gaap	Interest Paid Net InterestPaidNet	1377781000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	25000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	24587000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	37559000	USD
CY2019	jef	Non Cash Financing Purchase Of Common Shares For Treasury Settled After Current Period End Date NonCashFinancingPurchaseOfCommonSharesForTreasurySettledAfterCurrentPeriodEndDate	1200000	USD
	jef	Non Cash Financing Purchase Of Common Shares For Treasury Settled After Current Period End Date NonCashFinancingPurchaseOfCommonSharesForTreasurySettledAfterCurrentPeriodEndDate	17600000	USD
CY2020Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	1556136000	USD
CY2020Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	1556136000	USD
CY2020Q4	jef	Financial Instruments Owned At Fair Value Excluding Investments At Fair Value Based On Nav FinancialInstrumentsOwnedAtFairValueExcludingInvestmentsAtFairValueBasedOnNAV	17159193000	USD
CY2020Q4	us-gaap	Investments In And Advances To Affiliates At Fair Value InvestmentsInAndAdvancesToAffiliatesAtFairValue	48788000	USD
CY2020Q4	us-gaap	Securities Received As Collateral SecuritiesReceivedAsCollateral	7517000	USD
CY2020Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	1798659000	USD
CY2020Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	1798659000	USD
CY2020Q4	us-gaap	Financial Instruments Sold Not Yet Purchased At Fair Value FinancialInstrumentsSoldNotYetPurchasedAtFairValue	10017600000	USD
CY2020Q4	us-gaap	Shortterm Debt Fair Value ShorttermDebtFairValue	5067000	USD
CY2020Q4	jef	Other Secured Financings Fair Value OtherSecuredFinancingsFairValue	1543000	USD
CY2020Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	1712245000	USD
CY2020Q4	us-gaap	Obligation To Return Securities Received As Collateral ObligationToReturnSecuritiesReceivedAsCollateral	7517000	USD
CY2019Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	1433197000	USD
CY2019Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	1433197000	USD
CY2019Q4	jef	Financial Instruments Owned At Fair Value Excluding Investments At Fair Value Based On Nav FinancialInstrumentsOwnedAtFairValueExcludingInvestmentsAtFairValueBasedOnNAV	16308807000	USD
CY2019Q4	jef	Securities Purchased Under Agreements To Resellat Fair Value SecuritiesPurchasedUnderAgreementsToResellatFairValue	25000000	USD
CY2019Q4	us-gaap	Securities Received As Collateral SecuritiesReceivedAsCollateral	9500000	USD
CY2019Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	1632178000	USD
CY2019Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	1632178000	USD
CY2019Q4	us-gaap	Financial Instruments Sold Not Yet Purchased At Fair Value FinancialInstrumentsSoldNotYetPurchasedAtFairValue	10532460000	USD
CY2019Q4	us-gaap	Shortterm Debt Fair Value ShorttermDebtFairValue	20981000	USD
CY2019Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	1215285000	USD
CY2019Q4	us-gaap	Obligation To Return Securities Received As Collateral ObligationToReturnSecuritiesReceivedAsCollateral	9500000	USD
CY2020Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	17408000	USD
CY2019Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	14621000	USD
CY2020	jef	Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss Included In Other Comprehensive Income FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInOtherComprehensiveIncome	-33400000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	88000000.0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	24700000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3	1900000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3	143400000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-51600000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-82100000	USD
CY2019	jef	Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss Included In Other Comprehensive Income FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInOtherComprehensiveIncome	-11000000.0	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	68600000	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	26700000	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-217000000.0	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	44500000	USD
	jef	Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss Included In Other Comprehensive Income FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInOtherComprehensiveIncome	19400000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	57800000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	12300000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	79200000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	33600000	USD
CY2020Q4	jef	Excluded Securities From Unobservable Quantitative Information Assets ExcludedSecuritiesFromUnobservableQuantitativeInformationAssets	192000000.0	USD
CY2019Q4	jef	Excluded Securities From Unobservable Quantitative Information Assets ExcludedSecuritiesFromUnobservableQuantitativeInformationAssets	79900000	USD
CY2020Q4	jef	Excluded Securitiesfrom Unobservable Quantitative Information Liabilities ExcludedSecuritiesfromUnobservableQuantitativeInformationLiabilities	800000	USD
CY2019Q4	jef	Excluded Securitiesfrom Unobservable Quantitative Information Liabilities ExcludedSecuritiesfromUnobservableQuantitativeInformationLiabilities	400000	USD
CY2019	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	-2072000	USD
	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	-3856000	USD
CY2020	us-gaap	Fair Value Option Credit Risk Gains Losses On Assets FairValueOptionCreditRiskGainsLossesOnAssets	-25623000	USD
CY2020	jef	Fair Value Option Credit Risk Gains Losses On Loans FairValueOptionCreditRiskGainsLossesOnLoans	0	USD
CY2019	jef	Fair Value Option Credit Risk Gains Losses On Loans FairValueOptionCreditRiskGainsLossesOnLoans	656000	USD
	jef	Fair Value Option Credit Risk Gains Losses On Loans FairValueOptionCreditRiskGainsLossesOnLoans	-46000	USD
CY2020	jef	Fair Value Option Credit Risk Gains Losseson Loan Commitments FairValueOptionCreditRiskGainsLossesonLoanCommitments	464000	USD
CY2019	jef	Fair Value Option Credit Risk Gains Losseson Loan Commitments FairValueOptionCreditRiskGainsLossesonLoanCommitments	-1089000	USD
	jef	Fair Value Option Credit Risk Gains Losseson Loan Commitments FairValueOptionCreditRiskGainsLossesonLoanCommitments	-739000	USD
CY2020Q4	us-gaap	Fair Value Option Aggregate Differences Loans And Long Term Receivables FairValueOptionAggregateDifferencesLoansAndLongTermReceivables	1662647000	USD
CY2019Q4	us-gaap	Fair Value Option Aggregate Differences Loans And Long Term Receivables FairValueOptionAggregateDifferencesLoansAndLongTermReceivables	1546516000	USD
CY2020Q4	jef	Fair Value Option Loans Held As Assets Aggregate Amount In Nonaccrual Status And Or90 Days Or Greater Past Due Aggregated Difference FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatusAndOr90DaysOrGreaterPastDueAggregatedDifference	287889000	USD
CY2019Q4	jef	Fair Value Option Loans Held As Assets Aggregate Amount In Nonaccrual Status And Or90 Days Or Greater Past Due Aggregated Difference FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatusAndOr90DaysOrGreaterPastDueAggregatedDifference	197215000	USD
CY2020Q4	jef	Fair Value Option Aggregate Differences Longterm Debt And Shortterm Borrowing FairValueOptionAggregateDifferencesLongtermDebtAndShorttermBorrowing	-42819000	USD
CY2019Q4	jef	Fair Value Option Aggregate Differences Longterm Debt And Shortterm Borrowing FairValueOptionAggregateDifferencesLongtermDebtAndShorttermBorrowing	74408000	USD
CY2020Q4	jef	Fair Value Option Aggregate Differences Other Secured Financings FairValueOptionAggregateDifferencesOtherSecuredFinancings	2782000	USD
CY2019Q4	jef	Fair Value Option Aggregate Differences Other Secured Financings FairValueOptionAggregateDifferencesOtherSecuredFinancings	0	USD
CY2020Q4	us-gaap	Fair Value Option Loans Held As Assets90 Days Or More Past Due Aggregate Difference FairValueOptionLoansHeldAsAssets90DaysOrMorePastDueAggregateDifference	30000000.0	USD
CY2019Q4	us-gaap	Fair Value Option Loans Held As Assets90 Days Or More Past Due Aggregate Difference FairValueOptionLoansHeldAsAssets90DaysOrMorePastDueAggregateDifference	22200000	USD
CY2020Q4	jef	Fair Value Option Loans Held As Assets Aggregate Amount In Nonaccrual Status And Or90 Days Or Greater Past Due FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatusAndOr90DaysOrGreaterPastDue	69700000	USD
CY2019Q4	jef	Fair Value Option Loans Held As Assets Aggregate Amount In Nonaccrual Status And Or90 Days Or Greater Past Due FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatusAndOr90DaysOrGreaterPastDue	127000000.0	USD
CY2020Q4	us-gaap	Fair Value Option Loans Held As Assets90 Days Or More Past Due FairValueOptionLoansHeldAsAssets90DaysOrMorePastDue	3800000	USD
CY2019Q4	us-gaap	Fair Value Option Loans Held As Assets90 Days Or More Past Due FairValueOptionLoansHeldAsAssets90DaysOrMorePastDue	24800000	USD
CY2020Q4	us-gaap	Derivative Assets DerivativeAssets	481007000	USD
CY2020Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	641143000	USD
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	418408000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	527205000	USD
CY2020	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	4856000	USD
CY2019	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	-2546000	USD
	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	1824000	USD
CY2020	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	58275000	USD
CY2019	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-294871000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-177436000	USD
CY2020Q4	jef	Otc Derivative Assets Having Maturity Period Of Zero To Twelve Months OtcDerivativeAssetsHavingMaturityPeriodOfZeroToTwelveMonths	327243000	USD
CY2020Q4	jef	Otc Derivative Assets Having Maturity Period Of One To Five Years OtcDerivativeAssetsHavingMaturityPeriodOfOneToFiveYears	216006000	USD
CY2020Q4	jef	Otc Derivative Assets Having Maturity Period Of Greater Than Five Years OtcDerivativeAssetsHavingMaturityPeriodOfGreaterThanFiveYears	222966000	USD
CY2020Q4	jef	Otc Derivative Assets Cross Maturity Netting OtcDerivativeAssetsCrossMaturityNetting	73537000	USD
CY2020Q4	jef	Consolidated Otc Derivative Assets Net Of Crossmaturity Netting ConsolidatedOtcDerivativeAssetsNetOfCrossmaturityNetting	692678000	USD
CY2020Q4	jef	Derivative Assets Cross Product Counterparty Netting DerivativeAssetsCrossProductCounterpartyNetting	24723000	USD
CY2020Q4	jef	Otc Derivative Assets Included In Financial Instruments Owned OtcDerivativeAssetsIncludedInFinancialInstrumentsOwned	667955000	USD
CY2020Q4	jef	Exchange Traded Derivative Assets And Other Credit Agreements ExchangeTradedDerivativeAssetsAndOtherCreditAgreements	29800000	USD
CY2020Q4	jef	Cash Collateral Received CashCollateralReceived	216800000	USD
CY2020Q4	jef	Otc Derivative Liabilities Having Maturity Period Of Zero To Twelve Months OtcDerivativeLiabilitiesHavingMaturityPeriodOfZeroToTwelveMonths	224206000	USD
CY2020Q4	jef	Otc Derivative Liabilities Having Maturity Period Of One To Five Years OtcDerivativeLiabilitiesHavingMaturityPeriodOfOneToFiveYears	762117000	USD
CY2020Q4	jef	Otc Derivative Liabilities Having Maturity Period Of Greater Than Five Years OtcDerivativeLiabilitiesHavingMaturityPeriodOfGreaterThanFiveYears	189877000	USD
CY2020Q4	jef	Otc Derivative Liabilities Cross Maturity Netting OtcDerivativeLiabilitiesCrossMaturityNetting	73537000	USD
CY2020Q4	jef	Consolidated Otc Derivative Liabilities Net Of Crossmaturity Netting ConsolidatedOtcDerivativeLiabilitiesNetOfCrossmaturityNetting	1102663000	USD
CY2020Q4	jef	Derivative Liabilities Cross Product Counterparty Netting DerivativeLiabilitiesCrossProductCounterpartyNetting	24723000	USD
CY2020Q4	jef	Otc Derivative Liabilities Included In Financial Instruments Sold Not Yet Purchased OtcDerivativeLiabilitiesIncludedInFinancialInstrumentsSoldNotYetPurchased	1077940000	USD
CY2020Q4	jef	Exchange Traded Derivative Liabilities And Other Credit Agreements ExchangeTradedDerivativeLiabilitiesAndOtherCreditAgreements	22500000	USD
CY2020Q4	jef	Cash Collateral Pledged CashCollateralPledged	459300000	USD
CY2020Q4	jef	Fair Value Of Otc Derivatives Assets Counterparty Credit Quality FairValueOfOtcDerivativesAssetsCounterpartyCreditQuality	177908000	USD
CY2020Q4	jef	Fair Value Of Otc Derivatives Assets Counterparty Credit Quality Bbb Minus To Bbb Plus FairValueOfOtcDerivativesAssetsCounterpartyCreditQualityBbbMinusToBbbPlus	19628000	USD
CY2020Q4	jef	Fair Value Of Otc Derivatives Assets Counterparty Credit Quality Bb Plus Or Lower FairValueOfOtcDerivativesAssetsCounterpartyCreditQualityBbPlusOrLower	316361000	USD
CY2020Q4	jef	Fair Value Of Over Counter Derivatives Assets Counterparty Credit Quality Unrated FairValueOfOverCounterDerivativesAssetsCounterpartyCreditQualityUnrated	154058000	USD
CY2020Q4	jef	Otc Derivative Assets Included In Financial Instruments Owned OtcDerivativeAssetsIncludedInFinancialInstrumentsOwned	667955000	USD
CY2020Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	284600000	USD
CY2019Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	42900000	USD
CY2020Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	129800000	USD
CY2019Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	3100000	USD
CY2020Q4	jef	Collateral Received Aggregate Fair Value CollateralReceivedAggregateFairValue	141400000	USD
CY2019Q4	jef	Collateral Received Aggregate Fair Value CollateralReceivedAggregateFairValue	114100000	USD
CY2020Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	296200000	USD
CY2019Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	154000000.0	USD
CY2020Q4	us-gaap	Securities Loaned Including Not Subject To Master Netting Arrangement And Assets Other Than Securities Transferred SecuritiesLoanedIncludingNotSubjectToMasterNettingArrangementAndAssetsOtherThanSecuritiesTransferred	1810748000	USD
CY2020Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	15159273000	USD
CY2020Q4	us-gaap	Obligation To Return Securities Received As Collateral ObligationToReturnSecuritiesReceivedAsCollateral	7517000	USD
CY2020Q4	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	16977538000	USD
CY2019Q4	us-gaap	Securities Loaned Including Not Subject To Master Netting Arrangement And Assets Other Than Securities Transferred SecuritiesLoanedIncludingNotSubjectToMasterNettingArrangementAndAssetsOtherThanSecuritiesTransferred	1525140000	USD
CY2019Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	18756917000	USD
CY2019Q4	us-gaap	Obligation To Return Securities Received As Collateral ObligationToReturnSecuritiesReceivedAsCollateral	9500000	USD
CY2019Q4	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	20291557000	USD
CY2020Q4	us-gaap	Securities Loaned Including Not Subject To Master Netting Arrangement And Assets Other Than Securities Transferred SecuritiesLoanedIncludingNotSubjectToMasterNettingArrangementAndAssetsOtherThanSecuritiesTransferred	1810748000	USD
CY2020Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	15159273000	USD
CY2020Q4	us-gaap	Obligation To Return Securities Received As Collateral ObligationToReturnSecuritiesReceivedAsCollateral	7517000	USD
CY2020Q4	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	16977538000	USD
CY2019Q4	us-gaap	Securities Loaned Including Not Subject To Master Netting Arrangement And Assets Other Than Securities Transferred SecuritiesLoanedIncludingNotSubjectToMasterNettingArrangementAndAssetsOtherThanSecuritiesTransferred	1525140000	USD
CY2019Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	18756917000	USD
CY2019Q4	us-gaap	Obligation To Return Securities Received As Collateral ObligationToReturnSecuritiesReceivedAsCollateral	9500000	USD
CY2019Q4	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	20291557000	USD
CY2020Q4	us-gaap	Fair Value Of Securities Received As Collateral That Can Be Resold Or Repledged FairValueOfSecuritiesReceivedAsCollateralThatCanBeResoldOrRepledged	25900000000	USD
CY2019Q4	us-gaap	Fair Value Of Securities Received As Collateral That Can Be Resold Or Repledged FairValueOfSecuritiesReceivedAsCollateralThatCanBeResoldOrRepledged	28700000000	USD
CY2020Q4	us-gaap	Securities Borrowed Gross SecuritiesBorrowedGross	6934762000	USD
CY2020Q4	us-gaap	Securities Borrowed Liability SecuritiesBorrowedLiability	0	USD
CY2020Q4	us-gaap	Securities Borrowed SecuritiesBorrowed	6934762000	USD
CY2020Q4	us-gaap	Securities Borrowed Collateral Obligation To Return Cash SecuritiesBorrowedCollateralObligationToReturnCash	395342000	USD
CY2020Q4	us-gaap	Securities Borrowed Collateral Obligation To Return Securities SecuritiesBorrowedCollateralObligationToReturnSecurities	1706046000	USD
CY2020Q4	us-gaap	Securities Borrowed Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election SecuritiesBorrowedOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	4833374000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	11939773000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell Liability SecuritiesPurchasedUnderAgreementsToResellLiability	6843004000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	5096769000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Cash SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnCash	412327000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Securities SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnSecurities	4578560000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellAmountOffsetAgainstCollateral	105882000	USD
CY2020Q4	us-gaap	Securities Loaned Gross SecuritiesLoanedGross	1810748000	USD
CY2020Q4	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	0	USD
CY2020Q4	us-gaap	Securities Loaned SecuritiesLoaned	1810748000	USD
CY2020Q4	us-gaap	Securities Loaned Collateral Right To Reclaim Cash SecuritiesLoanedCollateralRightToReclaimCash	395342000	USD
CY2020Q4	us-gaap	Securities Loaned Collateral Right To Reclaim Securities SecuritiesLoanedCollateralRightToReclaimSecurities	1397550000	USD
CY2020Q4	us-gaap	Securities Loaned Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election SecuritiesLoanedOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	17856000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	15159273000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	6843004000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	8316269000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Cash SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimCash	412327000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	7122422000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	781520000	USD
CY2019Q4	us-gaap	Securities Borrowed Gross SecuritiesBorrowedGross	7624642000	USD
CY2019Q4	us-gaap	Securities Borrowed Liability SecuritiesBorrowedLiability	0	USD
CY2019Q4	us-gaap	Securities Borrowed SecuritiesBorrowed	7624642000	USD
CY2019Q4	us-gaap	Securities Borrowed Collateral Obligation To Return Cash SecuritiesBorrowedCollateralObligationToReturnCash	361394000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	7504670000	USD
CY2019Q4	us-gaap	Securities Borrowed Collateral Obligation To Return Securities SecuritiesBorrowedCollateralObligationToReturnSecurities	1479433000	USD
CY2019Q4	us-gaap	Securities Borrowed Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election SecuritiesBorrowedOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	5783815000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	15551845000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell Liability SecuritiesPurchasedUnderAgreementsToResellLiability	11252247000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	4299598000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Cash SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnCash	291316000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Securities SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnSecurities	3929977000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellAmountOffsetAgainstCollateral	78305000	USD
CY2019Q4	us-gaap	Securities Loaned Gross SecuritiesLoanedGross	1525140000	USD
CY2019Q4	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	0	USD
CY2019Q4	us-gaap	Securities Loaned SecuritiesLoaned	1525140000	USD
CY2019Q4	us-gaap	Securities Loaned Collateral Right To Reclaim Cash SecuritiesLoanedCollateralRightToReclaimCash	361394000	USD
CY2019Q4	us-gaap	Securities Loaned Collateral Right To Reclaim Securities SecuritiesLoanedCollateralRightToReclaimSecurities	970799000	USD
CY2019Q4	us-gaap	Securities Loaned Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election SecuritiesLoanedOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	192947000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	18756917000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	11252247000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Cash SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimCash	291316000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	6663807000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	549547000	USD
CY2020Q4	jef	Securities Borrowed Asset Net Subject To Review SecuritiesBorrowedAssetNetSubjectToReview	4757800000	USD
CY2020Q4	jef	Securities Borrowed Asset Collateral Received Subject To Review SecuritiesBorrowedAssetCollateralReceivedSubjectToReview	4617000000.0	USD
CY2020Q4	jef	Securities Sold Under Agreements To Repurchase Net Amount Subject To Review SecuritiesSoldUnderAgreementsToRepurchaseNetAmountSubjectToReview	720000000.0	USD
CY2020Q4	jef	Securities Sold Under Agreements To Repurchase Collateral Pledged Subject To Review SecuritiesSoldUnderAgreementsToRepurchaseCollateralPledgedSubjectToReview	733900000	USD
CY2019Q4	jef	Securities Borrowed Asset Net Subject To Review SecuritiesBorrowedAssetNetSubjectToReview	5683400000	USD
CY2019Q4	jef	Securities Borrowed Asset Collateral Received Subject To Review SecuritiesBorrowedAssetCollateralReceivedSubjectToReview	5523600000	USD
CY2019Q4	jef	Securities Sold Under Agreements To Repurchase Net Amount Subject To Review SecuritiesSoldUnderAgreementsToRepurchaseNetAmountSubjectToReview	439700000	USD
CY2019Q4	jef	Securities Sold Under Agreements To Repurchase Collateral Pledged Subject To Review SecuritiesSoldUnderAgreementsToRepurchaseCollateralPledgedSubjectToReview	447500000	USD
CY2020Q4	us-gaap	Cash And Securities Segregated Under Federal And Other Regulations CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations	604300000	USD
CY2019Q4	us-gaap	Cash And Securities Segregated Under Federal And Other Regulations CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations	796800000	USD
CY2020	jef	Assets Transferred Due To Securitization AssetsTransferredDueToSecuritization	6556200000	USD
CY2019	jef	Assets Transferred Due To Securitization AssetsTransferredDueToSecuritization	4780900000	USD
	jef	Assets Transferred Due To Securitization AssetsTransferredDueToSecuritization	7159300000	USD
CY2020	jef	Proceeds On New Securitizations ProceedsOnNewSecuritizations	6556200000	USD
CY2019	jef	Proceeds On New Securitizations ProceedsOnNewSecuritizations	4852800000	USD
	jef	Proceeds On New Securitizations ProceedsOnNewSecuritizations	7165300000	USD
CY2020	us-gaap	Cash Flows Between Transferee And Transferor Proceeds From New Transfers CashFlowsBetweenTransfereeAndTransferorProceedsFromNewTransfers	26800000	USD
CY2019	us-gaap	Cash Flows Between Transferee And Transferor Proceeds From New Transfers CashFlowsBetweenTransfereeAndTransferorProceedsFromNewTransfers	48300000	USD
	us-gaap	Cash Flows Between Transferee And Transferor Proceeds From New Transfers CashFlowsBetweenTransfereeAndTransferorProceedsFromNewTransfers	48500000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1652957000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-75483000	USD
CY2020	jef	Equity Method Investment Other Income Losses Related To Associated Companies Primarily Classified As Revenues EquityMethodInvestmentOtherIncomeLossesRelatedToAssociatedCompaniesPrimarilyClassifiedAsRevenues	23934000	USD
CY2020	jef	Equity Method Investments Contributionsto Distributions From Associated Companies Net EquityMethodInvestmentsContributionstoDistributionsFromAssociatedCompaniesNet	77545000	USD
CY2020	jef	Equity Method Investments Other Activity Net EquityMethodInvestmentsOtherActivityNet	7610000	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1686563000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2417332000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	202995000	USD
CY2019	jef	Equity Method Investment Other Income Losses Related To Associated Companies Primarily Classified As Revenues EquityMethodInvestmentOtherIncomeLossesRelatedToAssociatedCompaniesPrimarilyClassifiedAsRevenues	85169000	USD
CY2019	jef	Equity Method Investments Contributionsto Distributions From Associated Companies Net EquityMethodInvestmentsContributionstoDistributionsFromAssociatedCompaniesNet	-311957000	USD
CY2019	jef	Equity Method Investments Other Activity Net EquityMethodInvestmentsOtherActivityNet	-740582000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1652957000	USD
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2066829000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	57023000	USD
	jef	Equity Method Investment Other Income Losses Related To Associated Companies Primarily Classified As Revenues EquityMethodInvestmentOtherIncomeLossesRelatedToAssociatedCompaniesPrimarilyClassifiedAsRevenues	73662000	USD
	jef	Equity Method Investments Contributionsto Distributions From Associated Companies Net EquityMethodInvestmentsContributionstoDistributionsFromAssociatedCompaniesNet	-180876000	USD
	jef	Equity Method Investments Other Activity Net EquityMethodInvestmentsOtherActivityNet	400694000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2417332000	USD
	jef	Cash Invested In Limited Liability Company CashInvestedInLimitedLiabilityCompany	93000000.0	USD
CY2020Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	161000000.0	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	167153000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	182954000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1746314000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	1739980000	USD
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	1913467000	USD
CY2019Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	1922934000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	15300000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	14600000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13200000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	14411000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	11134000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	9900000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	9143000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	8632000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	764715000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	548490000	USD
CY2020Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0187
CY2019Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0324
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	8352039000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	8337061000	USD
CY2020Q4	jef	Assets Pledged For Indebtedness AssetsPledgedForIndebtedness	1445500000	USD
CY2020Q4	us-gaap	Secured Debt SecuredDebt	703400000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	350400000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	69800000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1598500000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	742400000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	81800000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y7M6D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.030
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	72491000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	76987000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	67164000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	63476000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	64563000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	342195000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	686876000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	102431000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	584445000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	362000	USD
CY2020Q4	jef	Operating Lease And Finance Lease Liability OperatingLeaseAndFinanceLeaseLiability	584807000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	77452000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	13576000	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	7590000	USD
CY2020	us-gaap	Lease Cost LeaseCost	83438000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	73300000	USD
CY2020	jef	Non Cash Rou Assets Recorded For New And Modified Leases NonCashROUAssetsRecordedForNewAndModifiedLeases	22460000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	70886000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	73374000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	71464000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	62552000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	59714000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	393995000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	731985000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals	21883000	USD
CY2019Q4	jef	Lessee Operating Lease Liability Payments Net Of Sublease Income Due LesseeOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDue	710102000	USD
CY2019	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	65600000	USD
	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	55700000	USD
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Other Carrying Amount RedeemableNoncontrollingInterestEquityOtherCarryingAmount	24700000	USD
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Other Carrying Amount RedeemableNoncontrollingInterestEquityOtherCarryingAmount	26600000	USD
CY2017Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0625
CY2017Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.10
CY2018Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.10
CY2018Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.125
CY2019Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.125
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.15
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.15
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.15
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.15
CY2020Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.15
CY2020Q4	jef	Options Issued To Purchased Number Of Shares OptionsIssuedToPurchasedNumberOfShares	2	shares
CY2020	jef	Restricted Cash Awards Compensation Expense RestrictedCashAwardsCompensationExpense	179600000	USD
CY2020Q4	jef	Restricted Cash Awards Compensation Cost Not Yet Recognized RestrictedCashAwardsCompensationCostNotYetRecognized	363500000	USD
CY2020	jef	Restricted Cash Awards Compensation Cost Not Yet Recognized Period For Recognition RestrictedCashAwardsCompensationCostNotYetRecognizedPeriodForRecognition	P3Y
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	40000000.0	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	49800000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	48200000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	10000000.0	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	12900000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	12200000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	41900000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y10M24D
CY2020Q4	jef	Other Shares Issuable OtherSharesIssuable	1115000	shares
CY2020Q4	jef	Potential Maximum Increase To Common Shares Outstanding From Restricted Stock And Other Shares PotentialMaximumIncreaseToCommonSharesOutstandingFromRestrictedStockAndOtherShares	23868000	shares
CY2019	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544600000	USD
CY2019Q1	jef	Lodged Tax Effect LodgedTaxEffect	544600000	USD
CY2019Q2	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544600000	USD
CY2019	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544600000	USD
CY2019	jef	Revenue Other Sources RevenueOtherSources	2568528000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	9500000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	8800000	USD
	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	8000000.0	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3923227000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2790128000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3119642000	USD
CY2020	jef	Revenue Other Sources RevenueOtherSources	3032703000	USD
	jef	Revenue Other Sources RevenueOtherSources	1890086000	USD
CY2020	us-gaap	Revenues Revenues	6955930000	USD
CY2019	us-gaap	Revenues Revenues	5358656000	USD
	us-gaap	Revenues Revenues	5009728000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3923227000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3923227000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2790128000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2790128000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3119642000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3119642000	USD
CY2020	jef	Contract With Customer Revenue Relatedto Performance Obligations Satisfiedin Previous Periods ContractWithCustomerRevenueRelatedtoPerformanceObligationsSatisfiedinPreviousPeriods	11100000	USD
CY2019	jef	Contract With Customer Revenue Relatedto Performance Obligations Satisfiedin Previous Periods ContractWithCustomerRevenueRelatedtoPerformanceObligationsSatisfiedinPreviousPeriods	27600000	USD
	jef	Contract With Customer Revenue Relatedto Performance Obligations Satisfiedin Previous Periods ContractWithCustomerRevenueRelatedtoPerformanceObligationsSatisfiedinPreviousPeriods	27000000.0	USD
CY2020	jef	Revenues Associated With Distribution Services RevenuesAssociatedWithDistributionServices	17600000	USD
CY2019	jef	Revenues Associated With Distribution Services RevenuesAssociatedWithDistributionServices	21700000	USD
	jef	Revenues Associated With Distribution Services RevenuesAssociatedWithDistributionServices	18100000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	332500000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	13000000.0	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	263700000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	14800000	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	12800000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	10900000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	10600000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	1800000	USD
CY2019Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	4800000	USD
CY2020	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	5100000	USD
CY2019	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	4100000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	2300000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	90350000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-10000000	USD
	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	10000000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	68261000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	53211000	USD
	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	37439000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	75395000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	11026000	USD
	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	11077000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	234006000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	54237000	USD
	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	58516000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	52765000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	83197000	USD
	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	39448000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1288000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-73482000	USD
	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-73013000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	13190000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-3324000	USD
	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-5943000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	64667000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6391000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-39508000	USD
CY2020	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	0	USD
CY2019	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544583000	USD
	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	0	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	298673000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-483955000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19008000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	813305000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	495566000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	284177000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	253778000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-16958000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	11923000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1067083000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	478608000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	296100000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	224087000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	100508000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	62181000	USD
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	45457000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.043
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	25648000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.054
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	12391000	USD
	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.042
CY2020	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	0	USD
CY2020	jef	Effective Income Tax Rate Reconciliation Recognition Of Accumulated Other Comprehensive Income Lodged Taxes Percent EffectiveIncomeTaxRateReconciliationRecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxesPercent	0
CY2019	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544583000	USD
CY2019	jef	Effective Income Tax Rate Reconciliation Recognition Of Accumulated Other Comprehensive Income Lodged Taxes Percent EffectiveIncomeTaxRateReconciliationRecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxesPercent	1.138
	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	0	USD
	jef	Effective Income Tax Rate Reconciliation Recognition Of Accumulated Other Comprehensive Income Lodged Taxes Percent EffectiveIncomeTaxRateReconciliationRecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxesPercent	0
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	13155000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.012
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	4518000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.009
	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	1823000	USD
	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.006
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-2561000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.002
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-19993000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.042
	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-48058000	USD
	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.162
CY2020	jef	Effective Income Tax Rate Reconciliation Non Deductible Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNonDeductibleExecutiveCompensationAmount	12814000	USD
CY2020	jef	Effective Income Tax Rate Reconciliation Non Deductible Executive Compensation Percent EffectiveIncomeTaxRateReconciliationNonDeductibleExecutiveCompensationPercent	0.012
CY2019	jef	Effective Income Tax Rate Reconciliation Non Deductible Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNonDeductibleExecutiveCompensationAmount	7444000	USD
CY2019	jef	Effective Income Tax Rate Reconciliation Non Deductible Executive Compensation Percent EffectiveIncomeTaxRateReconciliationNonDeductibleExecutiveCompensationPercent	0.016
	jef	Effective Income Tax Rate Reconciliation Non Deductible Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNonDeductibleExecutiveCompensationAmount	5810000	USD
	jef	Effective Income Tax Rate Reconciliation Non Deductible Executive Compensation Percent EffectiveIncomeTaxRateReconciliationNonDeductibleExecutiveCompensationPercent	0.019
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	8654000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Foreign EffectiveIncomeTaxRateReconciliationTaxCreditsForeign	0.008
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	5012000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Foreign EffectiveIncomeTaxRateReconciliationTaxCreditsForeign	0.010
	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	9046000	USD
	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Foreign EffectiveIncomeTaxRateReconciliationTaxCreditsForeign	0.031
CY2020	jef	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rate Remeasurement Of Deferred Tax Asset Amount EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateRemeasurementOfDeferredTaxAssetAmount	0	USD
CY2020	jef	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rate Remeasurement Of Deferred Tax Asset Percent EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateRemeasurementOfDeferredTaxAssetPercent	0
CY2019	jef	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rate Remeasurement Of Deferred Tax Asset Amount EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateRemeasurementOfDeferredTaxAssetAmount	0	USD
CY2019	jef	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rate Remeasurement Of Deferred Tax Asset Percent EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateRemeasurementOfDeferredTaxAssetPercent	0
	jef	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rate Remeasurement Of Deferred Tax Asset Amount EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateRemeasurementOfDeferredTaxAssetAmount	5673000	USD
	jef	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rate Remeasurement Of Deferred Tax Asset Percent EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateRemeasurementOfDeferredTaxAssetPercent	0.019
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Transition Tax On Accumulated Foreign Earnings Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017TransitionTaxOnAccumulatedForeignEarningsAmount	0	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Transition Tax On Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017TransitionTaxOnAccumulatedForeignEarningsPercent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Transition Tax On Accumulated Foreign Earnings Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017TransitionTaxOnAccumulatedForeignEarningsAmount	-6708000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Transition Tax On Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017TransitionTaxOnAccumulatedForeignEarningsPercent	-0.014
	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Transition Tax On Accumulated Foreign Earnings Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017TransitionTaxOnAccumulatedForeignEarningsAmount	2590000	USD
	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Transition Tax On Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017TransitionTaxOnAccumulatedForeignEarningsPercent	0.009
CY2020	jef	Effective Income Tax Rate Reconciliation Base Erosion And Anti Abuse Tax Amount EffectiveIncomeTaxRateReconciliationBaseErosionAndAntiAbuseTaxAmount	0	USD
CY2020	jef	Effective Income Tax Rate Reconciliation Base Erosion And Anti Abuse Tax Percent EffectiveIncomeTaxRateReconciliationBaseErosionAndAntiAbuseTaxPercent	0
CY2019	jef	Effective Income Tax Rate Reconciliation Base Erosion And Anti Abuse Tax Amount EffectiveIncomeTaxRateReconciliationBaseErosionAndAntiAbuseTaxAmount	-10000000	USD
CY2019	jef	Effective Income Tax Rate Reconciliation Base Erosion And Anti Abuse Tax Percent EffectiveIncomeTaxRateReconciliationBaseErosionAndAntiAbuseTaxPercent	-0.021
	jef	Effective Income Tax Rate Reconciliation Base Erosion And Anti Abuse Tax Amount EffectiveIncomeTaxRateReconciliationBaseErosionAndAntiAbuseTaxAmount	10000000	USD
	jef	Effective Income Tax Rate Reconciliation Base Erosion And Anti Abuse Tax Percent EffectiveIncomeTaxRateReconciliationBaseErosionAndAntiAbuseTaxPercent	0.034
CY2020	jef	Effective Income Tax Rate Reconciliation Change In Unrecognized Tax Benefits Related To Prior Periods Amount EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefitsRelatedToPriorPeriodsAmount	-4522000	USD
CY2020	jef	Effective Income Tax Rate Reconciliation Net Adjustment To Unrecognized Tax Benefits Related To Prior Periods Percent EffectiveIncomeTaxRateReconciliationNetAdjustmentToUnrecognizedTaxBenefitsRelatedToPriorPeriodsPercent	-0.005
CY2019	jef	Effective Income Tax Rate Reconciliation Change In Unrecognized Tax Benefits Related To Prior Periods Amount EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefitsRelatedToPriorPeriodsAmount	-20512000	USD
CY2019	jef	Effective Income Tax Rate Reconciliation Net Adjustment To Unrecognized Tax Benefits Related To Prior Periods Percent EffectiveIncomeTaxRateReconciliationNetAdjustmentToUnrecognizedTaxBenefitsRelatedToPriorPeriodsPercent	-0.043
	jef	Effective Income Tax Rate Reconciliation Change In Unrecognized Tax Benefits Related To Prior Periods Amount EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefitsRelatedToPriorPeriodsAmount	-19783000	USD
	jef	Effective Income Tax Rate Reconciliation Net Adjustment To Unrecognized Tax Benefits Related To Prior Periods Percent EffectiveIncomeTaxRateReconciliationNetAdjustmentToUnrecognizedTaxBenefitsRelatedToPriorPeriodsPercent	-0.067
CY2020	jef	Effective Income Tax Rate Reconciliation Interest On Unrecognized Tax Benefits Amount EffectiveIncomeTaxRateReconciliationInterestOnUnrecognizedTaxBenefitsAmount	15600000	USD
CY2020	jef	Effective Income Tax Rate Reconciliation Interest On Unrecognized Tax Benefits Percent EffectiveIncomeTaxRateReconciliationInterestOnUnrecognizedTaxBenefitsPercent	0.015
CY2019	jef	Effective Income Tax Rate Reconciliation Interest On Unrecognized Tax Benefits Amount EffectiveIncomeTaxRateReconciliationInterestOnUnrecognizedTaxBenefitsAmount	3568000	USD
CY2019	jef	Effective Income Tax Rate Reconciliation Interest On Unrecognized Tax Benefits Percent EffectiveIncomeTaxRateReconciliationInterestOnUnrecognizedTaxBenefitsPercent	0.007
	jef	Effective Income Tax Rate Reconciliation Interest On Unrecognized Tax Benefits Amount EffectiveIncomeTaxRateReconciliationInterestOnUnrecognizedTaxBenefitsAmount	-1197000	USD
	jef	Effective Income Tax Rate Reconciliation Interest On Unrecognized Tax Benefits Percent EffectiveIncomeTaxRateReconciliationInterestOnUnrecognizedTaxBenefitsPercent	-0.004
CY2020	jef	Effective Income Tax Rate Reconciliation Distribution To Shareholders Amount EffectiveIncomeTaxRateReconciliationDistributionToShareholdersAmount	0	USD
CY2020	jef	Effective Income Tax Rate Reconciliation Distribution To Shareholders Percent EffectiveIncomeTaxRateReconciliationDistributionToShareholdersPercent	0
CY2019	jef	Effective Income Tax Rate Reconciliation Distribution To Shareholders Amount EffectiveIncomeTaxRateReconciliationDistributionToShareholdersAmount	11996000	USD
CY2019	jef	Effective Income Tax Rate Reconciliation Distribution To Shareholders Percent EffectiveIncomeTaxRateReconciliationDistributionToShareholdersPercent	0.025
	jef	Effective Income Tax Rate Reconciliation Distribution To Shareholders Amount EffectiveIncomeTaxRateReconciliationDistributionToShareholdersAmount	0	USD
	jef	Effective Income Tax Rate Reconciliation Distribution To Shareholders Percent EffectiveIncomeTaxRateReconciliationDistributionToShareholdersPercent	0
CY2020	jef	Effective Income Tax Rate Reconciliation Business Acquisition Amount EffectiveIncomeTaxRateReconciliationBusinessAcquisitionAmount	0	USD
CY2020	jef	Effective Income Tax Rate Reconciliation Business Acquisition Percent EffectiveIncomeTaxRateReconciliationBusinessAcquisitionPercent	0
CY2019	jef	Effective Income Tax Rate Reconciliation Business Acquisition Amount EffectiveIncomeTaxRateReconciliationBusinessAcquisitionAmount	-36779000	USD
CY2019	jef	Effective Income Tax Rate Reconciliation Business Acquisition Percent EffectiveIncomeTaxRateReconciliationBusinessAcquisitionPercent	-0.077
	jef	Effective Income Tax Rate Reconciliation Business Acquisition Amount EffectiveIncomeTaxRateReconciliationBusinessAcquisitionAmount	0	USD
	jef	Effective Income Tax Rate Reconciliation Business Acquisition Percent EffectiveIncomeTaxRateReconciliationBusinessAcquisitionPercent	0
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	3297000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.003
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	5950000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.013
	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-3376000	USD
	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.011
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	298673000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.280
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-483955000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-1.011
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19008000	USD
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.064
CY2019	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544600000	USD
CY2019Q1	jef	Lodged Tax Effect LodgedTaxEffect	544600000	USD
CY2019Q2	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544600000	USD
CY2019	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544600000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	260138000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	197320000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	169020000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	41114000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	42306000	USD
	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	48083000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	22328000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	33007000	USD
	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	17521000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	8966000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	11006000	USD
	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	36324000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	267000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	1489000	USD
	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	980000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	314347000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	260138000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	197320000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	19900000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	13100000	USD
	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	-3100000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	87100000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	67200000	USD
CY2020Q4	jef	Expected Decrease In Unrecognized Tax Benefit Related To Uncertain Tax Position Over Next12 Months ExpectedDecreaseInUnrecognizedTaxBenefitRelatedToUncertainTaxPositionOverNext12Months	13800000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	15123000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	48695000	USD
CY2020Q4	jef	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	145617000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	274342000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	260590000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	91390000	USD
CY2020Q4	jef	Deferred Tax Assets Investments In Associated Companies DeferredTaxAssetsInvestmentsInAssociatedCompanies	36345000	USD
CY2019Q4	jef	Deferred Tax Assets Investments In Associated Companies DeferredTaxAssetsInvestmentsInAssociatedCompanies	16099000	USD
CY2020Q4	jef	Deferred Tax Assets Long Term Debt DeferredTaxAssetsLongTermDebt	42423000	USD
CY2019Q4	jef	Deferred Tax Assets Long Term Debt DeferredTaxAssetsLongTermDebt	28824000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	164010000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	184514000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	677860000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	630112000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	15958000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	18519000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	661902000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	611593000	USD
CY2020Q4	jef	Deferred Tax Liabilities Amortization Of Intangible Assets DeferredTaxLiabilitiesAmortizationOfIntangibleAssets	65683000	USD
CY2019Q4	jef	Deferred Tax Liabilities Amortization Of Intangible Assets DeferredTaxLiabilitiesAmortizationOfIntangibleAssets	68933000	USD
CY2020Q4	jef	Deferred Tax Liabilities Operating Lease Right Of Use Assets DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets	138708000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	63824000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	80192000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	268215000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	149125000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	393687000	USD
CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	462468000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	393700000	USD
	jef	Effective Income Tax Rate Reconciliation Base Erosion And Anti Abuse Tax Amount EffectiveIncomeTaxRateReconciliationBaseErosionAndAntiAbuseTaxAmount	10000000.0	USD
CY2020	jef	Income From Equity Method Investments Classified As Other Revenues IncomeFromEquityMethodInvestmentsClassifiedAsOtherRevenues	23934000	USD
CY2019	jef	Income From Equity Method Investments Classified As Other Revenues IncomeFromEquityMethodInvestmentsClassifiedAsOtherRevenues	85169000	USD
	jef	Income From Equity Method Investments Classified As Other Revenues IncomeFromEquityMethodInvestmentsClassifiedAsOtherRevenues	73975000	USD
CY2020	jef	Revenue Of Oil And Gas Production And Development Business RevenueOfOilAndGasProductionAndDevelopmentBusiness	154909000	USD
CY2019	jef	Revenue Of Oil And Gas Production And Development Business RevenueOfOilAndGasProductionAndDevelopmentBusiness	175169000	USD
	jef	Revenue Of Oil And Gas Production And Development Business RevenueOfOilAndGasProductionAndDevelopmentBusiness	127090000	USD
CY2020	us-gaap	Other Operating Income OtherOperatingIncome	117848000	USD
CY2019	us-gaap	Other Operating Income OtherOperatingIncome	130496000	USD
	us-gaap	Other Operating Income OtherOperatingIncome	135559000	USD
CY2020	us-gaap	Taxes Other TaxesOther	49300000	USD
CY2019	us-gaap	Taxes Other TaxesOther	41300000	USD
	us-gaap	Taxes Other TaxesOther	39900000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	900000000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	1600000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	769605000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	959593000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1022318000	USD
CY2020	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	4795000	USD
CY2019	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	5576000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	5107000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	764810000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	954017000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1017211000	USD
CY2020	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	23000	USD
CY2019	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	-5000	USD
	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	28000	USD
CY2020	us-gaap	Convertible Preferred Dividends Net Of Tax ConvertiblePreferredDividendsNetOfTax	5634000	USD
CY2019	us-gaap	Convertible Preferred Dividends Net Of Tax ConvertiblePreferredDividendsNetOfTax	5103000	USD
	us-gaap	Convertible Preferred Dividends Net Of Tax ConvertiblePreferredDividendsNetOfTax	0	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	770467000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	959115000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1017239000	USD
CY2019Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	500000000.0	USD
CY2019Q3	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	9250000	shares
CY2020Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	250000000.0	USD
CY2020Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	100000000.0	USD
CY2020Q2	jef	Stock Repurchase Program Additional Authorized Amount StockRepurchaseProgramAdditionalAuthorizedAmount	176700000	USD
CY2020Q3	jef	Stock Repurchase Program Additional Authorized Amount StockRepurchaseProgramAdditionalAuthorizedAmount	128000000.0	USD
CY2020	jef	Weighted Average Common Shares Outstanding WeightedAverageCommonSharesOutstanding	268518000	shares
CY2019	jef	Weighted Average Common Shares Outstanding WeightedAverageCommonSharesOutstanding	297796000	shares
	jef	Weighted Average Common Shares Outstanding WeightedAverageCommonSharesOutstanding	337817000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	285693000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	310694000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	347261000	shares
CY2020	jef	Incremental Common Shares Attributable To Redeemable Convertible Preferred Shares IncrementalCommonSharesAttributableToRedeemableConvertiblePreferredShares	4441000	shares
CY2019	jef	Incremental Common Shares Attributable To Redeemable Convertible Preferred Shares IncrementalCommonSharesAttributableToRedeemableConvertiblePreferredShares	4198000	shares
	jef	Incremental Common Shares Attributable To Redeemable Convertible Preferred Shares IncrementalCommonSharesAttributableToRedeemableConvertiblePreferredShares	0	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	290490000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	317032000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	351275000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	1801700	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	1947600	shares
	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	1724800	shares
CY2020	jef	Dividends On Participating Securities DividendsOnParticipatingSecurities	1000000.0	USD
CY2019	jef	Dividends On Participating Securities DividendsOnParticipatingSecurities	3600000	USD
CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	42134910	shares
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	812700000	USD
CY2020	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	19.29
CY2020Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	57200000	USD
CY2020Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	57200000	USD
CY2020Q4	us-gaap	Contractual Obligation Due In Next Twelve Months ContractualObligationDueInNextTwelveMonths	10551600000	USD
CY2020Q4	us-gaap	Contractual Obligation Due In Second Year ContractualObligationDueInSecondYear	88400000	USD
CY2020Q4	jef	Contractual Obligation Due In Third And Fourth Years ContractualObligationDueInThirdAndFourthYears	55500000	USD
CY2020Q4	jef	Contractual Obligation Due In Fifth And Sixth Years ContractualObligationDueInFifthAndSixthYears	16800000	USD
CY2020Q4	jef	Contractual Obligation Due In Seventh Year And Thereafter ContractualObligationDueInSeventhYearAndThereafter	6800000	USD
CY2020Q4	us-gaap	Contractual Obligation ContractualObligation	10719100000	USD
CY2020Q4	jef	Derivative Contracts Meeting Definitionof A Guarantee DerivativeContractsMeetingDefinitionofAGuarantee	181300000	USD
	jef	Income Loss From Discontinued Operations Before Tax Attributable To Parent IncomeLossFromDiscontinuedOperationsBeforeTaxAttributableToParent	140000000.0	USD
CY2020	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	6010874000	USD
CY2019	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	3892976000	USD
	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	3764034000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1067083000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	478608000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	296100000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	158439000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	152871000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	120317000	USD
CY2020Q4	us-gaap	Assets Assets	53118352000	USD
CY2019Q4	us-gaap	Assets Assets	49460234000	USD
CY2018Q4	us-gaap	Assets Assets	47131095000	USD
CY2020	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	6010874000	USD
CY2019	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	3892976000	USD
	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	3764034000	USD
CY2020Q1	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	1386328000	USD
CY2020Q2	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	1147589000	USD
CY2020Q3	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	1616170000	USD
CY2020Q4	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	1860787000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	112021000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	43545000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	304839000	USD
CY2020Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	308005000	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-2129000	USD
CY2020Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-2580000	USD
CY2020Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-324000	USD
CY2020Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-238000	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-282000	USD
CY2020Q2	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-198000	USD
CY2020Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-650000	USD
CY2020Q4	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-428000	USD
CY2020Q1	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1422000	USD
CY2020Q2	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1404000	USD
CY2020Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1404000	USD
CY2020Q4	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1404000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	113010000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	44919000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	304409000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	307267000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.37
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.08
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.12
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	302406000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	286764000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	280695000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	272901000	shares
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.37
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.07
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.11
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	308280000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	286764000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	285136000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	277342000	shares
CY2019Q1	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	828443000	USD
CY2019Q2	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	1101657000	USD
CY2019Q3	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	856778000	USD
CY2019Q4	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	1106098000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	47015000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	672276000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	49394000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	193878000	USD
CY2019Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1066000	USD
CY2019Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-191000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-116000	USD
CY2019Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-2606000	USD
CY2019Q1	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-138000	USD
CY2019Q2	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	427000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-242000	USD
CY2019Q4	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-333000	USD
CY2019Q1	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1276000	USD
CY2019Q2	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1276000	USD
CY2019Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1275000	USD
CY2019Q4	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1276000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	44811000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	670764000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	48477000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	195541000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.14
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.17
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	315175000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	307010000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	310288000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	310266000	shares
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.14
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.15
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	318752000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	312527000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	311897000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	316566000	shares
CY2019Q2	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544600000	USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	600000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	600000000	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	249750542	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	291644153	shares
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	66712070	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	24818459	shares
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	117000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	165000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-551000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-545054000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	37000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	117000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	545219000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-588000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	11392000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	1146000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	-11089000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax	-52000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax	-16000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	11392000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	1198000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-11073000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-16228000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-4653000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	9289000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionTax	146000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionTax	-144000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionTax	311000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Reclassification Adjustment Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterReclassificationAdjustmentTax	-16374000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Reclassification Adjustment Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterReclassificationAdjustmentTax	-4509000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Reclassification Adjustment Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterReclassificationAdjustmentTax	8978000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	552000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	161000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-161000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	552000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	-970000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	-2473000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	-297000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-957000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-490000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-697000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-13000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-1983000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	400000	USD

Files In Submission

Name	View Source	Status
0000096223-21-000009-index-headers.html	Edgar Link	pending
0000096223-21-000009-index.html	Edgar Link	pending
0000096223-21-000009.txt	Edgar Link	pending
0000096223-21-000009-xbrl.zip	Edgar Link	pending
ex-311x11302020.htm	Edgar Link	pending
ex-312x11302020.htm	Edgar Link	pending
ex-321x11302020.htm	Edgar Link	pending
ex-322x11302020.htm	Edgar Link	pending
exhibit-232for202010xk.htm	Edgar Link	pending
exhibit1052003incentivecom.htm	Edgar Link	pending
exhibit21for202010-k.htm	Edgar Link	pending
exhibit231for202010-k.htm	Edgar Link	pending
exhibit42for202010-k.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
jef-20201130.htm	Edgar Link	pending
jef-20201130.xsd	Edgar Link	pending
jef-20201130_cal.xml	Edgar Link	unprocessable
jef-20201130_def.xml	Edgar Link	unprocessable
jef-20201130_g1.jpg	Edgar Link	pending
jef-20201130_g2.jpg	Edgar Link	pending
jef-20201130_g3.jpg	Edgar Link	pending
jef-20201130_htm.xml	Edgar Link	completed
jef-20201130_lab.xml	Edgar Link	unprocessable
jef-20201130_pre.xml	Edgar Link	unprocessable
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R100.htm	Edgar Link	pending
R101.htm	Edgar Link	pending
R102.htm	Edgar Link	pending
R103.htm	Edgar Link	pending
R104.htm	Edgar Link	pending
R105.htm	Edgar Link	pending
R106.htm	Edgar Link	pending
R107.htm	Edgar Link	pending
R108.htm	Edgar Link	pending
R109.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R110.htm	Edgar Link	pending
R111.htm	Edgar Link	pending
R112.htm	Edgar Link	pending
R113.htm	Edgar Link	pending
R114.htm	Edgar Link	pending
R115.htm	Edgar Link	pending
R116.htm	Edgar Link	pending
R117.htm	Edgar Link	pending
R118.htm	Edgar Link	pending
R119.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R120.htm	Edgar Link	pending
R121.htm	Edgar Link	pending
R122.htm	Edgar Link	pending
R123.htm	Edgar Link	pending
R124.htm	Edgar Link	pending
R125.htm	Edgar Link	pending
R126.htm	Edgar Link	pending
R127.htm	Edgar Link	pending
R128.htm	Edgar Link	pending
R129.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R130.htm	Edgar Link	pending
R131.htm	Edgar Link	pending
R132.htm	Edgar Link	pending
R133.htm	Edgar Link	pending
R134.htm	Edgar Link	pending
R135.htm	Edgar Link	pending
R136.htm	Edgar Link	pending
R137.htm	Edgar Link	pending
R138.htm	Edgar Link	pending
R139.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R140.htm	Edgar Link	pending
R141.htm	Edgar Link	pending
R142.htm	Edgar Link	pending
R143.htm	Edgar Link	pending
R144.htm	Edgar Link	pending
R145.htm	Edgar Link	pending
R146.htm	Edgar Link	pending
R147.htm	Edgar Link	pending
R148.htm	Edgar Link	pending
R149.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R150.htm	Edgar Link	pending
R151.htm	Edgar Link	pending
R152.htm	Edgar Link	pending
R153.htm	Edgar Link	pending
R154.htm	Edgar Link	pending
R155.htm	Edgar Link	pending
R156.htm	Edgar Link	pending
R157.htm	Edgar Link	pending
R158.htm	Edgar Link	pending
R159.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R160.htm	Edgar Link	pending
R161.htm	Edgar Link	pending
R162.htm	Edgar Link	pending
R163.htm	Edgar Link	pending
R164.htm	Edgar Link	pending
R165.htm	Edgar Link	pending
R166.htm	Edgar Link	pending
R167.htm	Edgar Link	pending
R168.htm	Edgar Link	pending
R169.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R170.htm	Edgar Link	pending
R171.htm	Edgar Link	pending
R172.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
R95.htm	Edgar Link	pending
R96.htm	Edgar Link	pending
R97.htm	Edgar Link	pending
R98.htm	Edgar Link	pending
R99.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$JEF
Jefferies Financial Group Inc. Stock $jef

2020 Q4 Form 10-K Financial Statement

#000009622321000009 Filed on January 29, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JEF Jefferies Financial Group Inc. Stock $jef

2020 Q4 Form 10-K Financial Statement

#000009622321000009 Filed on January 29, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JEF
Jefferies Financial Group Inc. Stock $jef