$JEF
Jefferies Financial Group Inc. Stock $jef

$jef Overview Financials Valuation SEC Filings Company Website

2019 Q3 Form 10-Q Financial Statement

#000009622319000042 Filed on October 08, 2019

Income Statement

Concept	2019 Q3	2018 Q3
Revenue	$1.223B	$1.459B
YoY Change	-16.16%	32.32%
Cost Of Revenue	$85.77M	$84.88M
YoY Change	1.06%	18.55%
Gross Profit	$1.137B	$1.374B
YoY Change	-17.23%	33.28%
Gross Profit Margin	92.99%	94.18%
Selling, General & Admin	$715.6M	$706.4M
YoY Change	1.3%	1.95%
% of Gross Profit	62.92%	51.41%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$39.88M	$32.30M
YoY Change	23.49%	30.22%
% of Gross Profit	3.51%	2.35%
Operating Expenses	$755.5M	$738.8M
YoY Change	2.26%	-3.36%
Operating Profit	$381.9M	$635.3M
YoY Change	-39.89%	138.39%
Interest Expense	$23.66M	$28.84M
YoY Change	-17.94%	12.59%
% of Operating Profit	6.2%	4.54%
Other Income/Expense, Net
YoY Change
Pretax Income	$13.26M	$272.7M
YoY Change	-95.14%	967.37%
Income Tax	-$36.13M	$90.39M
% Of Pretax Income	-272.42%	33.15%
Net Earnings	$48.48M	$192.6M
YoY Change	-74.83%	93.89%
Net Earnings / Revenue	3.96%	13.2%
Basic Earnings Per Share	$0.16	$0.56
Diluted Earnings Per Share	$0.15	$0.55
COMMON SHARES
Basic Shares Outstanding	310.3M shares	341.4M shares
Diluted Shares Outstanding	311.9M shares	350.3M shares

Balance Sheet

Concept	2019 Q3	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$6.011B	$4.896B
YoY Change	22.77%	-2.41%
Cash & Equivalents	$6.011B	$4.896B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$11.84B	$10.76B
YoY Change	10.0%	-0.65%
LONG-TERM ASSETS
Property, Plant & Equipment		$346.9M
YoY Change		-52.33%
Goodwill	$1.735B	$1.703B
YoY Change	1.87%	-0.89%
Intangibles	$186.8M	$191.8M
YoY Change	-2.57%	-74.59%
Long-Term Investments	$2.346B	$2.451B
YoY Change	-4.27%	4.25%
Other Assets	$1.168B	$1.382B
YoY Change	-15.48%	-36.2%
Total Long-Term Assets	$37.43B	$38.19B
YoY Change	-1.99%	3.67%
TOTAL ASSETS
Total Short-Term Assets	$11.84B	$10.76B
Total Long-Term Assets	$37.43B	$38.19B
Total Assets	$49.26B	$48.95B
YoY Change	0.64%	2.69%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$7.351B	$6.680B
YoY Change	10.04%	-5.98%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$518.9M	$382.0M
YoY Change	35.84%	-8.42%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$18.29B	$19.46B
YoY Change	-6.0%	3.73%
LONG-TERM LIABILITIES
Long-Term Debt	$10.60B	$9.343B
YoY Change	13.48%	2.56%
Other Long-Term Liabilities	$10.30B	$9.479B
YoY Change	8.62%	8.11%
Total Long-Term Liabilities	$20.90B	$18.82B
YoY Change	11.03%	5.28%
TOTAL LIABILITIES
Total Short-Term Liabilities	$18.29B	$19.46B
Total Long-Term Liabilities	$20.90B	$18.82B
Total Liabilities	$39.06B	$38.16B
YoY Change	2.38%	4.5%
SHAREHOLDERS EQUITY
Retained Earnings	$6.255B	$5.672B
YoY Change	10.28%	13.44%
Common Stock	$4.032B	$4.661B
YoY Change	-13.51%	-8.39%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares	17.18M shares	85.56M shares
Shareholders Equity	$10.02B	$10.62B
YoY Change
Total Liabilities & Shareholders Equity	$49.26B	$48.95B
YoY Change	0.64%	2.69%

Cashflow Statement

Concept	2019 Q3	2018 Q3
OPERATING ACTIVITIES
Net Income	$48.48M	$192.6M
YoY Change	-74.83%	93.89%
Depreciation, Depletion And Amortization	$39.88M	$32.30M
YoY Change	23.49%	30.22%
Cash From Operating Activities	$189.1M	$724.0M
YoY Change	-73.88%	23.26%
INVESTING ACTIVITIES
Capital Expenditures	-$61.70M	-$41.50M
YoY Change	48.67%	56.02%
Acquisitions
YoY Change
Other Investing Activities	-$38.00M	-$85.10M
YoY Change	-55.35%	-57.02%
Cash From Investing Activities	-$99.60M	-$126.6M
YoY Change	-21.33%	-43.63%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	667.7M	-236.3M
YoY Change	-382.56%	833.99%
NET CHANGE
Cash From Operating Activities	189.1M	724.0M
Cash From Investing Activities	-99.60M	-126.6M
Cash From Financing Activities	667.7M	-236.3M
Net Change In Cash	757.2M	361.1M
YoY Change	109.69%	6.99%
FREE CASH FLOW
Cash From Operating Activities	$189.1M	$724.0M
Capital Expenditures	-$61.70M	-$41.50M
Free Cash Flow	$250.8M	$765.5M
YoY Change	-67.24%	24.67%

Facts In Submission

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	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--11-30
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
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	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2019-08-31
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-5721
	dei	Entity Registrant Name EntityRegistrantName	JEFFERIES FINANCIAL GROUP INC.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NY
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	13-2615557
	dei	Entity Address Address Line1 EntityAddressAddressLine1	520 Madison Avenue
	dei	Entity Address City Or Town EntityAddressCityOrTown	New York,
	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10022
	dei	City Area Code CityAreaCode	212
	dei	Local Phone Number LocalPhoneNumber	460-1900
	dei	Security12b Title Security12bTitle	Common Shares, par value $1 per share
	dei	Trading Symbol TradingSymbol	JEF
	dei	Security Exchange Name SecurityExchangeName	NYSE
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2019Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	19779000	USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	27064000	USD
CY2018Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	245178000	USD
CY2019Q3	jef	Mandatorily Redeemable Convertible Preferred Shares MandatorilyRedeemableConvertiblePreferredShares	125000000	USD
CY2018Q4	jef	Mandatorily Redeemable Convertible Preferred Shares MandatorilyRedeemableConvertiblePreferredShares	125000000	USD
CY2019Q3	us-gaap	Common Stock Value CommonStockValue	299868000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	307515000	USD
CY2019Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	3731712000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	3854847000	USD
CY2019Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-266452000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	288286000	USD
CY2019Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	6255314000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	5610218000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	10020442000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	10060866000	USD
CY2019Q3	us-gaap	Minority Interest MinorityInterest	27339000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	18391000	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10047781000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10079257000	USD
CY2019Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	49263208000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	47131095000	USD
CY2019Q3	us-gaap	Revenues Revenues	1223156000	USD
CY2018Q3	us-gaap	Revenues Revenues	1458977000	USD
	us-gaap	Revenues Revenues	3928539000	USD
	us-gaap	Revenues Revenues	3863914000	USD
CY2019Q3	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	856778000	USD
CY2018Q3	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	1150846000	USD
	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	2786878000	USD
	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	2957440000	USD
CY2019Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	446882000	USD
CY2018Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	461265000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1367034000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1429439000	USD
CY2019Q3	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	85773000	USD
CY2018Q3	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	84876000	USD
	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	233109000	USD
	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	257501000	USD
CY2019Q3	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	50858000	USD
CY2018Q3	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	44570000	USD
	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	163113000	USD
	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	131792000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	23663000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	28837000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	718910000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	708084000	USD
	us-gaap	Interest Expense InterestExpense	69819000	USD
	us-gaap	Interest Expense InterestExpense	74614000	USD
CY2019Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	39880000	USD
CY2018Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	32295000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	110600000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	92360000	USD
CY2019Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	268742000	USD
CY2019Q3	us-gaap	Costs And Expenses CostsAndExpenses	915798000	USD
CY2018Q3	us-gaap	Costs And Expenses CostsAndExpenses	897021000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	2662585000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	2693790000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-59020000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	253825000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	124293000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	263650000	USD
CY2019Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	72283000	USD
CY2018Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	18867000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	121766000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	84320000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	13263000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	272692000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	246059000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	347970000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-36131000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	90391000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-522626000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	51560000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	49394000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	182301000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	768685000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	296410000	USD
CY2019Q3	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	0	USD
CY2018Q3	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	0	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	130063000	USD
CY2019Q3	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2018Q3	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	0	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	643921000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	49394000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	182301000	USD
	us-gaap	Profit Loss ProfitLoss	768685000	USD
	us-gaap	Profit Loss ProfitLoss	1070394000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-116000	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-12000000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	759000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-13208000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-242000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	48477000	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	390000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	47000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	37294000	USD
CY2019Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1275000	USD
CY2018Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1276000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3827000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3619000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	48477000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	192635000	USD
	us-gaap	Net Income Loss NetIncomeLoss	764052000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1042689000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.16
CY2018Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.56
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.44
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.86
CY2019Q3	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0
CY2018Q3	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
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0.26
CY2019Q3	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerBasicShare	0
CY2018Q3	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	0
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerBasicShare	1.82
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.44
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.94
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.15
CY2018Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.55
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.41
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.85
CY2019Q3	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0
CY2018Q3	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
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0.26
CY2019Q3	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerDilutedShare	0
CY2018Q3	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerDilutedShare	0
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerDilutedShare	0
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerDilutedShare	1.80
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.15
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.41
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.91
CY2018Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	192635000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	764052000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	305846000	USD
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
CY2018Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	92922000	USD
CY2019Q3	jef	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Attributable To Parent DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxAttributableToParent	0	USD
CY2018Q3	jef	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Attributable To Parent DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxAttributableToParent	0	USD
	jef	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Attributable To Parent DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxAttributableToParent	0	USD
	jef	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Attributable To Parent DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxAttributableToParent	643921000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	48477000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	192635000	USD
	us-gaap	Net Income Loss NetIncomeLoss	764052000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1042689000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	49394000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	182301000	USD
	us-gaap	Profit Loss ProfitLoss	768685000	USD
	us-gaap	Profit Loss ProfitLoss	1070394000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	198000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1198000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	577000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1606000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	2000	USD
	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	105000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	198000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1200000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-542601000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1711000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-30070000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-27660000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-39263000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-59067000	USD
CY2019Q3	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
CY2018Q3	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
	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
	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
CY2019Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-30070000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-27660000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-39263000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-79526000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	5889000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	1169000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	26040000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	15887000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	0	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	101000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	-493000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	371000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	5889000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	1068000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	26533000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	15516000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	0	USD
CY2018Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	85000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	1584000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	0	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	470000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	0	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	85000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-470000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	1584000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	0	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	355000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	479000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	1063000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	6742000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-355000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-479000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-1063000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-6742000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-23628000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-27228000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-554738000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-57395000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	25766000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	155073000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	213947000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1012999000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-116000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-12000000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	759000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-13208000	USD
CY2019Q3	jef	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interests ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterests	-242000	USD
CY2018Q3	jef	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interests ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterests	390000	USD
	jef	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interests ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterests	47000	USD
	jef	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interests ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterests	37294000	USD
CY2019Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1275000	USD
CY2018Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1276000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3827000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3619000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	24849000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	165407000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	209314000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	985294000	USD
	us-gaap	Profit Loss ProfitLoss	768685000	USD
	us-gaap	Profit Loss ProfitLoss	1070394000	USD
	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
	jef	Deferred Income Tax Expense Benefit Continuing And Discontinued Operations DeferredIncomeTaxExpenseBenefitContinuingAndDiscontinuedOperations	8148000	USD
	jef	Deferred Income Tax Expense Benefit Continuing And Discontinued Operations DeferredIncomeTaxExpenseBenefitContinuingAndDiscontinuedOperations	275307000	USD
	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544583000	USD
	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	0	USD
	jef	Depreciationandamortizationofrealestatepropertyequipmentandleaseholdimprovements Depreciationandamortizationofrealestatepropertyequipmentandleaseholdimprovements	100679000	USD
	jef	Depreciationandamortizationofrealestatepropertyequipmentandleaseholdimprovements Depreciationandamortizationofrealestatepropertyequipmentandleaseholdimprovements	80647000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	-13252000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	-26796000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	37036000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	37975000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	21375000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	26529000	USD
	jef	Income Losses Relatedto Associated Companies Including Income Losses Relatedto Subsidiary Associated Companies Primarily Classifiedas Revenues IncomeLossesRelatedtoAssociatedCompaniesIncludingIncomeLossesRelatedtoSubsidiaryAssociatedCompaniesPrimarilyClassifiedasRevenues	193380000	USD
	jef	Income Losses Relatedto Associated Companies Including Income Losses Relatedto Subsidiary Associated Companies Primarily Classifiedas Revenues IncomeLossesRelatedtoAssociatedCompaniesIncludingIncomeLossesRelatedtoSubsidiaryAssociatedCompaniesPrimarilyClassifiedasRevenues	115007000	USD
	jef	Dividends Or Distributions From Associated Companies DividendsOrDistributionsFromAssociatedCompanies	249895000	USD
	jef	Dividends Or Distributions From Associated Companies DividendsOrDistributionsFromAssociatedCompanies	98426000	USD
	jef	Netgainslossesrelatedtopropertyandequipmentandotherassets Netgainslossesrelatedtopropertyandequipmentandotherassets	56706000	USD
	jef	Increase Decrease In Other Assets IncreaseDecreaseInOtherAssets	100165000	USD
	jef	Increase Decrease In Other Assets IncreaseDecreaseInOtherAssets	23910000	USD
	jef	Netgainslossesrelatedtopropertyandequipmentandotherassets Netgainslossesrelatedtopropertyandequipmentandotherassets	-10833000	USD
	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	0	USD
	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	221712000	USD
	jef	Increase Decreasein Securities Depositedwith Clearingand Depository Organizations IncreaseDecreaseinSecuritiesDepositedwithClearingandDepositoryOrganizations	153000	USD
	jef	Increase Decreasein Securities Depositedwith Clearingand Depository Organizations IncreaseDecreaseinSecuritiesDepositedwithClearingandDepositoryOrganizations	-64890000	USD
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-123734000	USD
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	1670376000	USD
	us-gaap	Increase Decrease In Securities Borrowed IncreaseDecreaseInSecuritiesBorrowed	1410295000	USD
	us-gaap	Increase Decrease In Securities Borrowed IncreaseDecreaseInSecuritiesBorrowed	-309722000	USD
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	jef	Increase Decrease In Securities Purchased Under Agreements To Resell IncreaseDecreaseInSecuritiesPurchasedUnderAgreementsToResell	53020000	USD
	us-gaap	Increase Decrease In Brokerage Receivables IncreaseDecreaseInBrokerageReceivables	-268321000	USD
	us-gaap	Increase Decrease In Brokerage Receivables IncreaseDecreaseInBrokerageReceivables	261534000	USD
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	jef	Increase Decrease Receivables From Customers Of Securities Operations IncreaseDecreaseReceivablesFromCustomersOfSecuritiesOperations	398154000	USD
	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	47657000	USD
	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	70514000	USD
	us-gaap	Increase Decrease In Trading Liabilities IncreaseDecreaseInTradingLiabilities	921280000	USD
	us-gaap	Increase Decrease In Trading Liabilities IncreaseDecreaseInTradingLiabilities	1122273000	USD
	us-gaap	Increase Decrease In Securities Loaned Transactions IncreaseDecreaseInSecuritiesLoanedTransactions	387016000	USD
	us-gaap	Increase Decrease In Securities Loaned Transactions IncreaseDecreaseInSecuritiesLoanedTransactions	-275629000	USD
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	us-gaap	Increase Decrease In Payables Under Repurchase Agreements IncreaseDecreaseInPayablesUnderRepurchaseAgreements	1250575000	USD
	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	-169021000	USD
	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	-287288000	USD
	us-gaap	Increase Decrease In Payables To Customers IncreaseDecreaseInPayablesToCustomers	422840000	USD
	us-gaap	Increase Decrease In Payables To Customers IncreaseDecreaseInPayablesToCustomers	523611000	USD
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	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	89429000	USD
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	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
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	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	199908000	USD
	jef	Payments To Acquire Property Plant And Equipment And Other Assets PaymentsToAcquirePropertyPlantAndEquipmentAndOtherAssets	164165000	USD
	jef	Payments To Acquire Property Plant And Equipment And Other Assets PaymentsToAcquirePropertyPlantAndEquipmentAndOtherAssets	282397000	USD
	jef	Proceeds From Disposals Of Property And Equipment And Other Assets ProceedsFromDisposalsOfPropertyAndEquipmentAndOtherAssets	20134000	USD
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	jef	Proceeds From Disposals Of Property And Equipment And Other Assets ProceedsFromDisposalsOfPropertyAndEquipmentAndOtherAssets	11994000	USD
	jef	Proceeds From Sale Of Subsidiary Net Of Expenses And Cash Of Operations Sold ProceedsFromSaleOfSubsidiaryNetOfExpensesAndCashOfOperationsSold	0	USD
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	jef	Proceeds From Sale Of Associated Companies ProceedsFromSaleOfAssociatedCompanies	379130000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-100743000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Payments To Acquire Receivables PaymentsToAcquireReceivables	333198000	USD
	us-gaap	Payments To Acquire Receivables PaymentsToAcquireReceivables	10000000	USD
	us-gaap	Proceeds From Sale And Collection Of Receivables ProceedsFromSaleAndCollectionOfReceivables	202516000	USD
	us-gaap	Proceeds From Sale And Collection Of Receivables ProceedsFromSaleAndCollectionOfReceivables	17404000	USD
	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	172493000	USD
	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	1936496000	USD
	jef	Capitaldistributionsandloanrepaymentsfromassociatedcompanies Capitaldistributionsandloanrepaymentsfromassociatedcompanies	31269000	USD
	jef	Capitaldistributionsandloanrepaymentsfromassociatedcompanies Capitaldistributionsandloanrepaymentsfromassociatedcompanies	1970648000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	2995000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	3242732000	USD
	jef	Proceeds From Sales Of Investments ProceedsFromSalesOfInvestments	890259000	USD
	jef	Proceeds From Sales Of Investments ProceedsFromSalesOfInvestments	1012423000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-130000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	1103174000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-979750000	USD
	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	861209000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	1103174000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-118541000	USD
	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	2493735000	USD
	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	2198326000	USD
	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	2141271000	USD
	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	2024680000	USD
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	jef	Netchangeinothersecuredfinancings Netchangeinothersecuredfinancings	409780000	USD
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	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	2369000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	2481000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	0	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	6771000	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	113000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	372849000	USD
CY2018Q3	jef	Cash And Securities Segregated And On Deposit For Regulatory Purposes Or Deposited With Clearing And Depository Organizations CashAndSecuritiesSegregatedAndOnDepositForRegulatoryPurposesOrDepositedWithClearingAndDepositoryOrganizations	878616000	USD
CY2019Q3	jef	Restricted Cash Other Assets RestrictedCashOtherAssets	47068000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	635835000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	112455000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	111776000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	792000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	3942000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	835510000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-157761000	USD
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	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	120322000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	835510000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-37439000	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-18243000	USD
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	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	669119000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	27459000	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
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6681781000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	5801964000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6011350000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4895788000	USD
CY2019Q3	jef	Cash And Securities Segregated And On Deposit For Regulatory Purposes Or Deposited With Clearing And Depository Organizations CashAndSecuritiesSegregatedAndOnDepositForRegulatoryPurposesOrDepositedWithClearingAndDepositoryOrganizations	623363000	USD
CY2018Q3	jef	Restricted Cash Other Assets RestrictedCashOtherAssets	27560000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6681781000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	5801964000	USD
CY2019Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9877361000	USD
CY2019Q3	jef	Profit Loss Excluding Net Income Loss Attributable To Redeemable Noncontrolling Interests ProfitLossExcludingNetIncomeLossAttributableToRedeemableNoncontrollingInterests	48361000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-23628000	USD
CY2019Q3	jef	Contributionsfrom Noncontrolling Interests ContributionsfromNoncontrollingInterests	66000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	181780000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	12150000	USD
CY2019Q3	jef	Change In Fair Value Of Redeemable Noncontrolling Interests ChangeInFairValueOfRedeemableNoncontrollingInterests	-2558000	USD
CY2019Q3	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	8141000	USD
CY2019Q3	us-gaap	Dividends Common Stock DividendsCommonStock	40015000	USD
CY2019Q3	us-gaap	Stockholders Equity Other StockholdersEquityOther	-2405000	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10047781000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10567441000	USD
CY2018Q3	jef	Profit Loss Excluding Net Income Loss Attributable To Redeemable Noncontrolling Interests ProfitLossExcludingNetIncomeLossAttributableToRedeemableNoncontrollingInterests	180635000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1409886000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-27228000	USD
CY2018Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	12777000	USD
CY2018Q3	jef	Change In Fair Value Of Redeemable Noncontrolling Interests ChangeInFairValueOfRedeemableNoncontrollingInterests	-6732000	USD
CY2018Q3	jef	Consolidation Of Asset Management Entity ConsolidationOfAssetManagementEntity	8316000	USD
CY2018Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2485000	USD
CY2018Q3	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	49484000	USD
CY2018Q3	us-gaap	Dividends Common Stock DividendsCommonStock	43549000	USD
CY2018Q3	us-gaap	Stockholders Equity Other StockholdersEquityOther	-2090000	USD
CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10646751000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10079257000	USD
	jef	Profit Loss Excluding Net Income Loss Attributable To Redeemable Noncontrolling Interests ProfitLossExcludingNetIncomeLossAttributableToRedeemableNoncontrollingInterests	764811000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-554738000	USD
	jef	Contributionsfrom Noncontrolling Interests ContributionsfromNoncontrollingInterests	6771000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	2481000	USD
	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	181780000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	37036000	USD
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	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	355280000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	118956000	USD
	us-gaap	Stockholders Equity Other StockholdersEquityOther	-11018000	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10047781000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10138979000	USD
CY2017Q4	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	17812000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest Adjusted Balance1 StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	10156791000	USD
	jef	Profit Loss Excluding Net Income Loss Attributable To Redeemable Noncontrolling Interests ProfitLossExcludingNetIncomeLossAttributableToRedeemableNoncontrollingInterests	1029481000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-57395000	USD
	jef	Contributionsfrom Noncontrolling Interests ContributionsfromNoncontrollingInterests	113000	USD
	jef	Reversal Of Cumulative Redeemable Noncontrolling Interests Fair Value Adjustments Prior To Deconsolidation ReversalOfCumulativeRedeemableNoncontrollingInterestsFairValueAdjustmentsPriorToDeconsolidation	237669000	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	37975000	USD
	jef	Change In Fair Value Of Redeemable Noncontrolling Interests ChangeInFairValueOfRedeemableNoncontrollingInterests	-28136000	USD
	jef	Consolidation Of Asset Management Entity ConsolidationOfAssetManagementEntity	8316000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2485000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	635835000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	116690000	USD
	us-gaap	Stockholders Equity Other StockholdersEquityOther	-11977000	USD
CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10646751000	USD
	us-gaap	Nature Of Operations NatureOfOperations	Nature of Operations<div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;padding-bottom:10px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Jefferies Financial Group Inc. ("Jefferies" or the "Company") is a diversified financial services company engaged in investment banking and capital markets, asset management and direct investing. Jefferies Group LLC ("Jefferies Group"), our largest subsidiary, is the largest independent full-service global investment banking firm headquartered in the U.S. </span></div><div style="line-height:120%;padding-bottom:10px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Jefferies Group operates in </span><span style="font-family:inherit;font-size:10pt;"><span>two</span></span><span style="font-family:inherit;font-size:10pt;"> business segments: Capital Markets and Asset Management. Capital Markets includes investment banking, sales and trading and other related services. Investment banking provides capital markets and financial advisory services to clients across most industry sectors in the Americas, Europe and Asia. Sales and trading 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, as well as other principal and corporate investing activities. Asset Management provides investment management services to investors in the U.S. and overseas and makes capital investments in managed funds and accounts. In March 2013, Jefferies Group became an indirect wholly-owned subsidiary of Jefferies, yet retains a separate credit rating and continues to be a separate U.S. Securities and Exchange Commission ("SEC") reporting company. </span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> Merchant Banking is where we invest in unique long-term opportunities. Our current Merchant Banking businesses and investments include National Beef Packing Company, LLC ("National Beef") (beef processing), Spectrum Brands Holdings, Inc. ("Spectrum Brands") (consumer products), 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), The We Company, formerly known as WeWork, (global network of workspaces), HomeFed LLC ("HomeFed") (real estate), Idaho Timber (manufacturing) and FXCM Group, LLC ("FXCM") (provider of online foreign exchange trading services). Our Merchant Banking businesses and investments also included Leucadia Asset Management ("LAM") (asset management) and Berkadia Commercial Mortgage Holding LLC ("Berkadia") (commercial mortgage banking, investment sales and servicing), prior to their 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="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">We own </span><span style="font-family:inherit;font-size:10pt;"><span>31%</span></span><span style="font-family:inherit;font-size:10pt;"> of National Beef, one of the largest beef processing companies in the U.S. On June 5, 2018, we completed the sale of </span><span style="font-family:inherit;font-size:10pt;"><span>48%</span></span><span style="font-family:inherit;font-size:10pt;"> of National Beef to Marfrig Global Foods S.A. ("Marfrig") reducing our ownership in National Beef from </span><span style="font-family:inherit;font-size:10pt;"><span>79%</span></span><span style="font-family:inherit;font-size:10pt;"> to </span><span style="font-family:inherit;font-size:10pt;"><span>31%</span></span><span style="font-family:inherit;font-size:10pt;">. As of the closing of the sale on June 5, 2018, we deconsolidated our investment in National Beef and account for our remaining </span><span style="font-family:inherit;font-size:10pt;"><span>31%</span></span><span style="font-family:inherit;font-size:10pt;"> 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 23 for more information.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">At </span><span style="font-family:inherit;font-size:10pt;">August 31, 2019</span><span style="font-family:inherit;font-size:10pt;">, we owned approximately </span><span style="font-family:inherit;font-size:10pt;"><span>15%</span></span><span style="font-family:inherit;font-size:10pt;"> of Spectrum Brands, a publicly traded global consumer products company on the NYSE (NYSE: SPB), and we reflect this investment at fair value based on quoted market prices. In September 2019, the Jefferies Board of Directors approved a distribution to stockholders of Jefferies of these Spectrum Brands shares. Jefferies will distribute the </span><span style="font-family:inherit;font-size:10pt;"><span>7,514,477</span></span><span style="font-family:inherit;font-size:10pt;"> Spectrum Brands shares through a special pro rata dividend effective on October 11, 2019 to Jefferies stockholders of record as of the close of business on September 30, 2019. </span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">We own approximately </span><span style="font-family:inherit;font-size:10pt;"><span>42%</span></span><span style="font-family:inherit;font-size:10pt;"> of the common shares of Linkem, as well as convertible preferred shares which, if converted, would increase our ownership to approximately </span><span style="font-family:inherit;font-size:10pt;"><span>54%</span></span><span style="font-family:inherit;font-size:10pt;"> of Linkem's common equity at </span><span style="font-family:inherit;font-size:10pt;">August 31, 2019</span><span style="font-family:inherit;font-size:10pt;">. Linkem provides residential broadband services in Italy using LTE technologies deployed over the 3.5 GHz spectrum band. Linkem is accounted for under the equity method. </span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Vitesse Energy Finance is our </span><span style="font-family:inherit;font-size:10pt;"><span>97%</span></span><span style="font-family:inherit;font-size:10pt;"> owned consolidated subsidiary that acquires and invests in non-operated working interests and royalties predominantly in the Bakken Shale oil field in North Dakota. JETX Energy is our </span><span style="font-family:inherit;font-size:10pt;"><span>98%</span></span><span style="font-family:inherit;font-size:10pt;"> owned consolidated subsidiary that currently has non-operated working interests and acreage in east Texas.</span></div><div style="line-height:120%;padding-bottom:16px;padding-top:16px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">We invested </span><span style="font-family:inherit;font-size:10pt;"><span>$9.0 million</span></span><span style="font-family:inherit;font-size:10pt;"> in 2013 in The We Company, which creates collaborative office communities, and have received </span><span style="font-family:inherit;font-size:10pt;"><span>$31.0 million</span></span><span style="font-family:inherit;font-size:10pt;"> in cash to date. We continue to own approximately </span><span style="font-family:inherit;font-size:10pt;"><span>0.8%</span></span><span style="font-family:inherit;font-size:10pt;"> of the company. Our interest in The We Company is reflected in Trading assets in our financial statements at fair value.</span></div><div style="line-height:120%;padding-bottom:16px;padding-top:16px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Through June 30, 2019, we owned an approximate </span><span style="font-family:inherit;font-size:10pt;"><span>70%</span></span><span style="font-family:inherit;font-size:10pt;"> equity interest of HomeFed, which owns and develops residential and mixed-use real estate properties and accounted for our interest 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 </span><span style="font-family:inherit;font-size:10pt;"><span>two</span></span><span style="font-family:inherit;font-size:10pt;"> shares of our common </span></div><div style="line-height:120%;padding-bottom:16px;padding-top:16px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">stock for each share of HomeFed common stock. A total of </span><span style="font-family:inherit;font-size:10pt;"><span>9.3 million</span></span><span style="font-family:inherit;font-size:10pt;"> shares were issued, which were valued at </span><span style="font-family:inherit;font-size:10pt;"><span>$178.8 million</span></span><span style="font-family:inherit;font-size:10pt;"> 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 </span><span style="font-family:inherit;font-size:10pt;"><span>9.25 million</span></span><span style="font-family:inherit;font-size:10pt;"> shares in the open market.</span></div><span style="font-family:inherit;font-size:10pt;">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 </span><span style="font-family:inherit;font-size:10pt;"><span>$596.4 million</span></span><span style="font-family:inherit;font-size:10pt;"> for </span><span style="font-family:inherit;font-size:10pt;"><span>100%</span></span><span style="font-family:inherit;font-size:10pt;"> of HomeFed's equity balance. In accordance with purchase accounting, we preliminarily allocated the </span><span style="font-family:inherit;font-size:10pt;"><span>$596.4 million</span></span><span style="font-family:inherit;font-size:10pt;"> fair value for </span><span style="font-family:inherit;font-size:10pt;"><span>100%</span></span><span style="font-family:inherit;font-size:10pt;"> of HomeFed to its assets, liabilities and noncontrolling interests. We recorded </span><span style="font-family:inherit;font-size:10pt;"><span>$101.7 million</span></span><span style="font-family:inherit;font-size:10pt;"> of cash, </span><span style="font-family:inherit;font-size:10pt;"><span>$413.2 million</span></span><span style="font-family:inherit;font-size:10pt;"> of real estate, </span><span style="font-family:inherit;font-size:10pt;"><span>$198.3 million</span></span><span style="font-family:inherit;font-size:10pt;"> of investments in associated companies, </span><span style="font-family:inherit;font-size:10pt;"><span>$37.4 million</span></span><span style="font-family:inherit;font-size:10pt;"> of deferred tax assets, </span><span style="font-family:inherit;font-size:10pt;"><span>$15.3 million</span></span><span style="font-family:inherit;font-size:10pt;"> of goodwill and intangibles, </span><span style="font-family:inherit;font-size:10pt;"><span>$6.6 million</span></span><span style="font-family:inherit;font-size:10pt;"> of other assets, </span><span style="font-family:inherit;font-size:10pt;"><span>$125.5 million</span></span><span style="font-family:inherit;font-size:10pt;"> of long-term debt, </span><span style="font-family:inherit;font-size:10pt;"><span>$46.7 million</span></span><span style="font-family:inherit;font-size:10pt;"> of payables, expense accruals and other liabilities and </span><span style="font-family:inherit;font-size:10pt;"><span>$3.9 million</span></span><span style="font-family:inherit;font-size:10pt;"> of noncontrolling interests. In addition, associated with the acquisition, we also recorded </span><span style="font-family:inherit;font-size:10pt;"><span>$32.4 million</span></span><span style="font-family:inherit;font-size:10pt;"> of goodwill generated by the establishment of </span><span style="font-family:inherit;font-size:10pt;"><span>$32.4 million</span></span><span style="font-family:inherit;font-size:10pt;"> 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 </span><span style="font-family:inherit;font-size:10pt;"><span>4 years</span></span><span style="font-family:inherit;font-size:10pt;"> at time of acquisition. Our preliminary allocation of the acquisition price is based on our preliminary estimate of fair value for each of the acquired assets and liabilities, which were developed primarily utilizing discounted cash flow models. Such amounts are subject to revision as additional information about fair values of assets and liabilities becomes available. In connection with the acquisition of the remaining interest of HomeFed, we recognized a preliminary </span><span style="font-family:inherit;font-size:10pt;"><span>$72.1 million</span></span><span style="font-family:inherit;font-size:10pt;"> non-cash pre-tax gain in Other revenues on the remeasurement of our </span><span style="font-family:inherit;font-size:10pt;"><span>70%</span></span><span style="font-family:inherit;font-size:10pt;"> interest in HomeFed to fair value. The fair value of our </span><span style="font-family:inherit;font-size:10pt;"><span>70%</span></span><span style="font-family:inherit;font-size:10pt;"> interest in HomeFed was based on the implied </span><span style="font-family:inherit;font-size:10pt;"><span>$596.4 million</span></span><span style="font-family:inherit;font-size:10pt;"> equity value for </span><span style="font-family:inherit;font-size:10pt;"><span>100%</span></span> of HomeFed.
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	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	28204000	USD
CY2019Q3	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	2931000000.0	USD
CY2018Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	3223700000	USD
CY2019Q3	us-gaap	Receivables From Customers ReceivablesFromCustomers	1686200000	USD
CY2018Q4	us-gaap	Receivables From Customers ReceivablesFromCustomers	2017100000	USD
CY2019Q3	us-gaap	Payables To Broker Dealers And Clearing Organizations PayablesToBrokerDealersAndClearingOrganizations	2253000000.0	USD
CY2018Q4	us-gaap	Payables To Broker Dealers And Clearing Organizations PayablesToBrokerDealersAndClearingOrganizations	2465600000	USD
CY2019Q3	us-gaap	Payables To Customers PayablesToCustomers	3599600000	USD
CY2018Q4	us-gaap	Payables To Customers PayablesToCustomers	3176700000	USD
	us-gaap	Interest Paid Net InterestPaidNet	1257311000	USD
	us-gaap	Interest Paid Net InterestPaidNet	1059139000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	25825000	USD
CY2019Q3	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	2494645000	USD
CY2019Q3	us-gaap	Derivative Assets DerivativeAssets	514742000	USD
CY2019Q3	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	2494645000	USD
CY2019Q3	jef	Financial Instruments Owned Trading Assetsat Fair Value Excluding Investments Basedon Net Asset Value FinancialInstrumentsOwnedTradingAssetsatFairValueExcludingInvestmentsBasedonNetAssetValue	16622459000	USD
CY2019Q3	jef	Securities Purchased Under Agreements To Resellat Fair Value SecuritiesPurchasedUnderAgreementsToResellatFairValue	25000000	USD
CY2019Q3	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	2599376000	USD
CY2019Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	562806000	USD
CY2019Q3	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	2599376000	USD
CY2019Q3	us-gaap	Trading Liabilities Fair Value Disclosure TradingLiabilitiesFairValueDisclosure	10296315000	USD
CY2019Q3	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	1014509000	USD
CY2018Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	2413931000	USD
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	166775000	USD
CY2018Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	2413931000	USD
CY2018Q4	jef	Financial Instruments Owned Trading Assetsat Fair Value Excluding Investments Basedon Net Asset Value FinancialInstrumentsOwnedTradingAssetsatFairValueExcludingInvestmentsBasedonNetAssetValue	17068897000	USD
CY2018Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	2513050000	USD
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1127653000	USD
CY2018Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	2513050000	USD
CY2018Q4	us-gaap	Trading Liabilities Fair Value Disclosure TradingLiabilitiesFairValueDisclosure	9478946000	USD
CY2018Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	686170000	USD
CY2019Q3	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	19154000	USD
CY2018Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	20996000	USD
CY2019Q3	jef	Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss Included In Other Comprehensive Income FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInOtherComprehensiveIncome	700000	USD
CY2019Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	79000000.0	USD
CY2019Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	70300000	USD
CY2019Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3	43500000	USD
CY2019Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3	23800000	USD
CY2019Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-150300000	USD
CY2019Q3	jef	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings And Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarningsAndOtherComprehensiveIncomeLoss	12800000	USD
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	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	60200000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	47800000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3	98300000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3	64100000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-123300000	USD
	jef	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings And Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarningsAndOtherComprehensiveIncomeLoss	55800000	USD
CY2018Q3	jef	Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss Included In Other Comprehensive Income FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInOtherComprehensiveIncome	-100000	USD
CY2018Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	13600000	USD
CY2018Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	13800000	USD
CY2018Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	11700000	USD
CY2018Q3	jef	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings And Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarningsAndOtherComprehensiveIncomeLoss	-4400000	USD
	jef	Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss Included In Other Comprehensive Income FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInOtherComprehensiveIncome	11800000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	49100000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	10000000.0	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	29800000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	26800000	USD
CY2019Q3	jef	Excluded Securities From Unobservable Quantitative Information Assets ExcludedSecuritiesFromUnobservableQuantitativeInformationAssets	72400000	USD
CY2018Q4	jef	Excluded Securities From Unobservable Quantitative Information Assets ExcludedSecuritiesFromUnobservableQuantitativeInformationAssets	40300000	USD
CY2019Q3	jef	Excluded Securitiesfrom Unobservable Quantitative Information Liabilities ExcludedSecuritiesfromUnobservableQuantitativeInformationLiabilities	2300000	USD
CY2018Q4	jef	Excluded Securitiesfrom Unobservable Quantitative Information Liabilities ExcludedSecuritiesfromUnobservableQuantitativeInformationLiabilities	500000	USD
CY2019Q3	us-gaap	Fair Value Option Aggregate Differences Loans And Long Term Receivables FairValueOptionAggregateDifferencesLoansAndLongTermReceivables	1356508000	USD
CY2018Q4	us-gaap	Fair Value Option Aggregate Differences Loans And Long Term Receivables FairValueOptionAggregateDifferencesLoansAndLongTermReceivables	961554000	USD
CY2019Q3	jef	Fair Value Option Loans Held As Assets Aggregate Amount In Nonaccrual Status And Or90 Days Or Greater Past Due Aggregated Difference FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatusAndOr90DaysOrGreaterPastDueAggregatedDifference	139795000	USD
CY2018Q4	jef	Fair Value Option Loans Held As Assets Aggregate Amount In Nonaccrual Status And Or90 Days Or Greater Past Due Aggregated Difference FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatusAndOr90DaysOrGreaterPastDueAggregatedDifference	158392000	USD
CY2019Q3	jef	Fair Value Option Aggregate Differences Longterm Debt FairValueOptionAggregateDifferencesLongtermDebt	59370000	USD
CY2018Q4	jef	Fair Value Option Aggregate Differences Longterm Debt FairValueOptionAggregateDifferencesLongtermDebt	114669000	USD
CY2019Q3	us-gaap	Fair Value Option Loans Held As Assets90 Days Or More Past Due Aggregate Difference FairValueOptionLoansHeldAsAssets90DaysOrMorePastDueAggregateDifference	20900000	USD
CY2018Q4	us-gaap	Fair Value Option Loans Held As Assets90 Days Or More Past Due Aggregate Difference FairValueOptionLoansHeldAsAssets90DaysOrMorePastDueAggregateDifference	20500000	USD
CY2019Q3	jef	Fair Value Of Otc Derivatives Assets Counterparty Credit Quality Bbb Minus To Bbb Plus FairValueOfOtcDerivativesAssetsCounterpartyCreditQualityBbbMinusToBbbPlus	47945000	USD
CY2019Q3	us-gaap	Derivative Assets DerivativeAssets	514742000	USD
CY2019Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	562806000	USD
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	166775000	USD
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1127653000	USD
CY2019Q3	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	-467000	USD
CY2018Q3	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	60000	USD
	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	-2445000	USD
	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	1692000	USD
CY2019Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-84495000	USD
CY2018Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	3364000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-296143000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-229146000	USD
CY2019Q3	jef	Otc Derivative Assets Having Maturity Period Of Zero To Twelve Months OtcDerivativeAssetsHavingMaturityPeriodOfZeroToTwelveMonths	291709000	USD
CY2019Q3	jef	Otc Derivative Assets Having Maturity Period Of One To Five Years OtcDerivativeAssetsHavingMaturityPeriodOfOneToFiveYears	310094000	USD
CY2019Q3	jef	Otc Derivative Assets Having Maturity Period Of Greater Than Five Years OtcDerivativeAssetsHavingMaturityPeriodOfGreaterThanFiveYears	187323000	USD
CY2019Q3	jef	Otc Derivative Assets Cross Maturity Netting OtcDerivativeAssetsCrossMaturityNetting	64462000	USD
CY2019Q3	jef	Consolidated Otc Derivative Assets Net Of Crossmaturity Netting ConsolidatedOtcDerivativeAssetsNetOfCrossmaturityNetting	724664000	USD
CY2019Q3	jef	Derivative Assets Cross Product Counterparty Netting DerivativeAssetsCrossProductCounterpartyNetting	26934000	USD
CY2019Q3	jef	Otc Derivative Assets Included In Financial Instruments Owned OtcDerivativeAssetsIncludedInFinancialInstrumentsOwned	697730000	USD
CY2019Q3	jef	Exchange Traded Derivative Assets And Other Credit Agreements ExchangeTradedDerivativeAssetsAndOtherCreditAgreements	30300000	USD
CY2019Q3	jef	Cash Collateral Received CashCollateralReceived	213200000	USD
CY2019Q3	jef	Otc Derivative Liabilities Having Maturity Period Of Zero To Twelve Months OtcDerivativeLiabilitiesHavingMaturityPeriodOfZeroToTwelveMonths	237694000	USD
CY2019Q3	jef	Otc Derivative Liabilities Having Maturity Period Of One To Five Years OtcDerivativeLiabilitiesHavingMaturityPeriodOfOneToFiveYears	201224000	USD
CY2019Q3	jef	Otc Derivative Liabilities Having Maturity Period Of Greater Than Five Years OtcDerivativeLiabilitiesHavingMaturityPeriodOfGreaterThanFiveYears	162421000	USD
CY2019Q3	jef	Otc Derivative Liabilities Cross Maturity Netting OtcDerivativeLiabilitiesCrossMaturityNetting	64462000	USD
CY2019Q3	jef	Consolidated Otc Derivative Liabilities Net Of Crossmaturity Netting ConsolidatedOtcDerivativeLiabilitiesNetOfCrossmaturityNetting	536877000	USD
CY2019Q3	jef	Derivative Liabilities Cross Product Counterparty Netting DerivativeLiabilitiesCrossProductCounterpartyNetting	26934000	USD
CY2019Q3	jef	Otc Derivative Liabilities Included In Trading Liabilities OtcDerivativeLiabilitiesIncludedInTradingLiabilities	509943000	USD
CY2019Q3	jef	Exchange Traded Derivative Liabilities And Other Credit Agreements ExchangeTradedDerivativeLiabilitiesAndOtherCreditAgreements	370800000	USD
CY2019Q3	jef	Cash Collateral Pledged CashCollateralPledged	318000000.0	USD
CY2019Q3	jef	Fair Value Of Otc Derivatives Assets Counterparty Credit Quality FairValueOfOtcDerivativesAssetsCounterpartyCreditQuality	169620000	USD
CY2019Q3	jef	Fair Value Of Otc Derivatives Assets Counterparty Credit Quality Bb Plus Or Lower FairValueOfOtcDerivativesAssetsCounterpartyCreditQualityBbPlusOrLower	275252000	USD
CY2019Q3	jef	Fair Value Of Over Counter Derivatives Assets Counterparty Credit Quality Unrated FairValueOfOverCounterDerivativesAssetsCounterpartyCreditQualityUnrated	204913000	USD
CY2019Q3	jef	Otc Derivative Assets Included In Financial Instruments Owned OtcDerivativeAssetsIncludedInFinancialInstrumentsOwned	697730000	USD
CY2019Q3	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	113700000	USD
CY2018Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	93500000	USD
CY2019Q3	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	80000000.0	USD
CY2018Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	61500000	USD
CY2019Q3	jef	Collateral Received Aggregate Fair Value CollateralReceivedAggregateFairValue	57000000.0	USD
CY2018Q4	jef	Collateral Received Aggregate Fair Value CollateralReceivedAggregateFairValue	91500000	USD
CY2019Q3	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	90600000	USD
CY2018Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	123300000	USD
CY2019Q3	us-gaap	Securities Loaned Including Not Subject To Master Netting Arrangement And Assets Other Than Securities Transferred SecuritiesLoanedIncludingNotSubjectToMasterNettingArrangementAndAssetsOtherThanSecuritiesTransferred	2182865000	USD
CY2019Q3	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	21323082000	USD
CY2019Q3	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	23505947000	USD
CY2018Q4	us-gaap	Securities Loaned Including Not Subject To Master Netting Arrangement And Assets Other Than Securities Transferred SecuritiesLoanedIncludingNotSubjectToMasterNettingArrangementAndAssetsOtherThanSecuritiesTransferred	1838688000	USD
CY2018Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	17193486000	USD
CY2018Q4	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	19032174000	USD
CY2019Q3	us-gaap	Securities Loaned Including Not Subject To Master Netting Arrangement And Assets Other Than Securities Transferred SecuritiesLoanedIncludingNotSubjectToMasterNettingArrangementAndAssetsOtherThanSecuritiesTransferred	2182865000	USD
CY2019Q3	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	21323082000	USD
CY2018Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	17193486000	USD
CY2019Q3	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	23505947000	USD
CY2018Q4	us-gaap	Securities Loaned Including Not Subject To Master Netting Arrangement And Assets Other Than Securities Transferred SecuritiesLoanedIncludingNotSubjectToMasterNettingArrangementAndAssetsOtherThanSecuritiesTransferred	1838688000	USD
CY2019Q3	us-gaap	Securities Borrowed Collateral Obligation To Return Securities SecuritiesBorrowedCollateralObligationToReturnSecurities	1653688000	USD
CY2018Q4	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	19032174000	USD
CY2019Q3	us-gaap	Fair Value Of Securities Received As Collateral That Can Be Resold Or Repledged FairValueOfSecuritiesReceivedAsCollateralThatCanBeResoldOrRepledged	31100000000	USD
CY2018Q4	us-gaap	Fair Value Of Securities Received As Collateral That Can Be Resold Or Repledged FairValueOfSecuritiesReceivedAsCollateralThatCanBeResoldOrRepledged	23100000000	USD
CY2019Q3	us-gaap	Securities Borrowed Gross SecuritiesBorrowedGross	7895149000	USD
CY2019Q3	us-gaap	Securities Borrowed Liability SecuritiesBorrowedLiability	0	USD
CY2019Q3	us-gaap	Securities Borrowed SecuritiesBorrowed	7895149000	USD
CY2019Q3	us-gaap	Securities Borrowed Collateral Obligation To Return Cash SecuritiesBorrowedCollateralObligationToReturnCash	707436000	USD
CY2019Q3	us-gaap	Securities Borrowed Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election SecuritiesBorrowedOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	5534025000	USD
CY2019Q3	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	17586096000	USD
CY2019Q3	us-gaap	Securities Purchased Under Agreements To Resell Liability SecuritiesPurchasedUnderAgreementsToResellLiability	13086101000	USD
CY2019Q3	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	4499995000	USD
CY2019Q3	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Cash SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnCash	454507000	USD
CY2019Q3	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Securities SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnSecurities	3817544000	USD
CY2019Q3	us-gaap	Securities Purchased Under Agreements To Resell Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellAmountOffsetAgainstCollateral	227944000	USD
CY2019Q3	us-gaap	Securities Loaned Gross SecuritiesLoanedGross	2182865000	USD
CY2019Q3	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	0	USD
CY2019Q3	us-gaap	Securities Loaned SecuritiesLoaned	2182865000	USD
CY2019Q3	us-gaap	Securities Loaned Collateral Right To Reclaim Cash SecuritiesLoanedCollateralRightToReclaimCash	707436000	USD
CY2019Q3	us-gaap	Securities Loaned Collateral Right To Reclaim Securities SecuritiesLoanedCollateralRightToReclaimSecurities	1452911000	USD
CY2019Q3	us-gaap	Securities Loaned Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election SecuritiesLoanedOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	22518000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	21323082000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	13086101000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	8236981000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Cash SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimCash	454507000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	6269894000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	1512580000	USD
CY2018Q4	us-gaap	Securities Borrowed Gross SecuritiesBorrowedGross	6538212000	USD
CY2018Q4	us-gaap	Securities Borrowed Liability SecuritiesBorrowedLiability	0	USD
CY2018Q4	us-gaap	Securities Borrowed SecuritiesBorrowed	6538212000	USD
CY2018Q4	us-gaap	Securities Borrowed Collateral Obligation To Return Cash SecuritiesBorrowedCollateralObligationToReturnCash	468778000	USD
CY2018Q4	us-gaap	Securities Borrowed Collateral Obligation To Return Securities SecuritiesBorrowedCollateralObligationToReturnSecurities	1193986000	USD
CY2018Q4	us-gaap	Securities Borrowed Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election SecuritiesBorrowedOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	4875448000	USD
CY2018Q4	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	11336175000	USD
CY2018Q4	us-gaap	Securities Purchased Under Agreements To Resell Liability SecuritiesPurchasedUnderAgreementsToResellLiability	8550417000	USD
CY2018Q4	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	2785758000	USD
CY2018Q4	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Cash SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnCash	609225000	USD
CY2018Q4	us-gaap	Securities Loaned Collateral Right To Reclaim Securities SecuritiesLoanedCollateralRightToReclaimSecurities	1343704000	USD
CY2018Q4	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Securities SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnSecurities	2126730000	USD
CY2018Q4	us-gaap	Securities Purchased Under Agreements To Resell Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellAmountOffsetAgainstCollateral	49803000	USD
CY2018Q4	us-gaap	Securities Loaned Gross SecuritiesLoanedGross	1838688000	USD
CY2018Q4	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	0	USD
CY2018Q4	us-gaap	Securities Loaned SecuritiesLoaned	1838688000	USD
CY2018Q4	us-gaap	Securities Loaned Collateral Right To Reclaim Cash SecuritiesLoanedCollateralRightToReclaimCash	468778000	USD
CY2018Q4	us-gaap	Securities Loaned Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election SecuritiesLoanedOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	26206000	USD
CY2018Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	17193486000	USD
CY2018Q4	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	8550417000	USD
CY2018Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	8643069000	USD
CY2018Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Cash SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimCash	609225000	USD
CY2018Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	7070967000	USD
CY2018Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	962877000	USD
CY2019Q3	jef	Securities Borrowed Asset Net Subject To Review SecuritiesBorrowedAssetNetSubjectToReview	5473000000.0	USD
CY2019Q3	jef	Securities Borrowed Asset Collateral Received Subject To Review SecuritiesBorrowedAssetCollateralReceivedSubjectToReview	5322700000	USD
CY2019Q3	jef	Securities Sold Under Agreements To Repurchase Net Amount Subject To Review SecuritiesSoldUnderAgreementsToRepurchaseNetAmountSubjectToReview	382900000	USD
CY2019Q3	jef	Securities Sold Under Agreements To Repurchase Collateral Pledged Subject To Review SecuritiesSoldUnderAgreementsToRepurchaseCollateralPledgedSubjectToReview	392400000	USD
CY2018Q4	jef	Securities Borrowed Asset Net Subject To Review SecuritiesBorrowedAssetNetSubjectToReview	4825700000	USD
CY2018Q4	jef	Securities Borrowed Asset Collateral Received Subject To Review SecuritiesBorrowedAssetCollateralReceivedSubjectToReview	4711700000	USD
CY2018Q4	jef	Securities Sold Under Agreements To Repurchase Net Amount Subject To Review SecuritiesSoldUnderAgreementsToRepurchaseNetAmountSubjectToReview	931700000	USD
CY2018Q4	jef	Securities Sold Under Agreements To Repurchase Collateral Pledged Subject To Review SecuritiesSoldUnderAgreementsToRepurchaseCollateralPledgedSubjectToReview	963600000	USD
CY2019Q3	us-gaap	Cash And Securities Segregated Under Federal And Other Regulations CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations	658300000	USD
CY2018Q4	us-gaap	Cash And Securities Segregated Under Federal And Other Regulations CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations	708000000.0	USD
CY2019Q3	jef	Assets Transferred Due To Securitization AssetsTransferredDueToSecuritization	789300000	USD
CY2018Q3	jef	Assets Transferred Due To Securitization AssetsTransferredDueToSecuritization	1865500000	USD
	jef	Assets Transferred Due To Securitization AssetsTransferredDueToSecuritization	2894400000	USD
	jef	Assets Transferred Due To Securitization AssetsTransferredDueToSecuritization	5665900000	USD
CY2019Q3	jef	Proceeds On New Securitizations ProceedsOnNewSecuritizations	789300000	USD
CY2018Q3	jef	Proceeds On New Securitizations ProceedsOnNewSecuritizations	1866200000	USD
	jef	Proceeds On New Securitizations ProceedsOnNewSecuritizations	2966300000	USD
	jef	Proceeds On New Securitizations ProceedsOnNewSecuritizations	5668600000	USD
CY2019Q3	us-gaap	Cash Flows Between Transferee And Transferor Proceeds From New Transfers CashFlowsBetweenTransfereeAndTransferorProceedsFromNewTransfers	16800000	USD
CY2018Q3	us-gaap	Cash Flows Between Transferee And Transferor Proceeds From New Transfers CashFlowsBetweenTransfereeAndTransferorProceedsFromNewTransfers	17200000	USD
	us-gaap	Cash Flows Between Transferee And Transferor Proceeds From New Transfers CashFlowsBetweenTransfereeAndTransferorProceedsFromNewTransfers	47200000	USD
	us-gaap	Cash Flows Between Transferee And Transferor Proceeds From New Transfers CashFlowsBetweenTransfereeAndTransferorProceedsFromNewTransfers	35700000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1411762000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	378000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2254000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1409886000	USD
CY2019Q3	us-gaap	Other Investment Not Readily Marketable Fair Value OtherInvestmentNotReadilyMarketableFairValue	195300000	USD
CY2018Q4	us-gaap	Other Investment Not Readily Marketable Fair Value OtherInvestmentNotReadilyMarketableFairValue	230000000.0	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	2300000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0.0	USD
CY2019Q3	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	1185800000	USD
CY2019Q3	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	900000	USD
CY2019Q3	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	2042400000	USD
CY2019Q3	jef	Variable Interest Entity Assetsof Non Consolidated Vie VariableInterestEntityAssetsofNonConsolidatedVie	19727000000.0	USD
CY2018Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	746400000	USD
CY2018Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	0	USD
CY2018Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	1646700000	USD
CY2018Q4	jef	Variable Interest Entity Assetsof Non Consolidated Vie VariableInterestEntityAssetsofNonConsolidatedVie	12382400000	USD
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CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2417332000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	121766000	USD
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CY2019Q3	us-gaap	Equity Method Investments EquityMethodInvestments	2346297000	USD
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2066829000	USD
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CY2018Q3	us-gaap	Equity Method Investments EquityMethodInvestments	2450901000	USD
CY2019Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	72283000	USD
CY2018Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	18867000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	121766000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	84320000	USD
CY2019Q3	jef	Equity Method Investments Income Losses Relatedto Subsidiary Associated Companies Primarily Classifiedas Revenues EquityMethodInvestmentsIncomeLossesRelatedtoSubsidiaryAssociatedCompaniesPrimarilyClassifiedasRevenues	17293000	USD
CY2018Q3	jef	Equity Method Investments Income Losses Relatedto Subsidiary Associated Companies Primarily Classifiedas Revenues EquityMethodInvestmentsIncomeLossesRelatedtoSubsidiaryAssociatedCompaniesPrimarilyClassifiedasRevenues	5853000	USD
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	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	7067180000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	3341369000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations Before Extraordinary Items EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems	654014000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations Before Extraordinary Items EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems	591191000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	654014000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	591191000	USD
CY2019Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	186838000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	188291000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	1734955000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	1701840000	USD
CY2019Q3	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	1921793000	USD
CY2018Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	1890131000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4000000.0	USD
CY2018Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3300000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	10600000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9900000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	4038000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	15221000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	14748000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	11460000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	10077000	USD
CY2019Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	518914000	USD
CY2018Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	387492000	USD
CY2019Q3	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0342
CY2018Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0308
CY2019Q3	us-gaap	Long Term Debt LongTermDebt	7968785000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	7617563000	USD
CY2019Q3	us-gaap	Redeemable Noncontrolling Interest Equity Other Carrying Amount RedeemableNoncontrollingInterestEquityOtherCarryingAmount	27100000	USD
CY2018Q4	us-gaap	Redeemable Noncontrolling Interest Equity Other Carrying Amount RedeemableNoncontrollingInterestEquityOtherCarryingAmount	19800000	USD
CY2018Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.10
CY2018Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.125
CY2019Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.125
CY2019Q3	us-gaap	Share Based Compensation ShareBasedCompensation	12200000	USD
CY2018Q3	us-gaap	Share Based Compensation ShareBasedCompensation	12800000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	37000000.0	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	38000000.0	USD
CY2019Q3	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3000000.0	USD
CY2018Q3	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4000000.0	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	9300000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	10000000.0	USD
CY2019Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	92500000	USD
CY2019Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y
CY2019Q3	jef	Potential Maximum Increase To Common Shares Outstanding From Restricted Stock And Other Shares PotentialMaximumIncreaseToCommonSharesOutstandingFromRestrictedStockAndOtherShares	21560000	shares
CY2019Q3	jef	Restricted Cash Awards Compensation Cost Not Yet Recognized RestrictedCashAwardsCompensationCostNotYetRecognized	498100000	USD
CY2019Q3	jef	Restricted Cash Awards Compensation Cost Not Yet Recognized Period For Recognition RestrictedCashAwardsCompensationCostNotYetRecognizedPeriodForRecognition	P3Y
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-542092000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-14193000	USD
	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
	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544600000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	734427000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	780079000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2054441000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2343048000	USD
CY2019Q3	jef	Revenue Other Sources RevenueOtherSources	488729000	USD
CY2018Q3	jef	Revenue Other Sources RevenueOtherSources	678898000	USD
	jef	Revenue Other Sources RevenueOtherSources	1874098000	USD
	jef	Revenue Other Sources RevenueOtherSources	1520866000	USD
CY2019Q3	us-gaap	Revenues Revenues	1223156000	USD
CY2018Q3	us-gaap	Revenues Revenues	1458977000	USD
	us-gaap	Revenues Revenues	3928539000	USD
	us-gaap	Revenues Revenues	3863914000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	734427000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	734427000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	780079000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	780079000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2054441000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2054441000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2343048000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2343048000	USD
CY2019Q3	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	276700000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	250600000	USD
CY2019Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	12900000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	14200000	USD
CY2019Q3	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	9600000	USD
CY2018Q3	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	6300000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	9800000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	12900000	USD
CY2019Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	4400000	USD
CY2018Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	4700000	USD
CY2019Q3	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	1600000	USD
CY2018Q3	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	1500000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	3800000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	1500000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	253300000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	60500000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	251400000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	54100000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-522600000	USD
	jef	Increase Decrease Of Deferred Tax Liabilities IncreaseDecreaseOfDeferredTaxLiabilities	-36000000.0	USD
	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
CY2019Q2	jef	Recognition Of Accumulated Other Comprehensive Income Lodged Taxes RecognitionOfAccumulatedOtherComprehensiveIncomeLodgedTaxes	544600000	USD
	jef	Income Tax Expense Benefit From Reversalof Valuation Allowance IncomeTaxExpenseBenefitFromReversalofValuationAllowance	-43900000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	48477000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	192635000	USD
	us-gaap	Net Income Loss NetIncomeLoss	764052000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1042689000	USD
CY2019Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	316000	USD
CY2018Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	1054000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	4667000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	5049000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	48161000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	191581000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	759385000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1037640000	USD
CY2019Q3	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	-7000	USD
CY2018Q3	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	3000	USD
	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	29000	USD
	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	34000	USD
CY2019Q3	us-gaap	Convertible Preferred Dividends Net Of Tax ConvertiblePreferredDividendsNetOfTax	0	USD
CY2018Q3	us-gaap	Convertible Preferred Dividends Net Of Tax ConvertiblePreferredDividendsNetOfTax	1276000	USD
	us-gaap	Convertible Preferred Dividends Net Of Tax ConvertiblePreferredDividendsNetOfTax	3827000	USD
	us-gaap	Convertible Preferred Dividends Net Of Tax ConvertiblePreferredDividendsNetOfTax	0	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	48154000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	192860000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	763241000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1037674000	USD
CY2019Q3	jef	Weighted Average Common Shares Outstanding WeightedAverageCommonSharesOutstanding	296834000	shares
CY2018Q3	jef	Weighted Average Common Shares Outstanding WeightedAverageCommonSharesOutstanding	332191000	shares
	jef	Weighted Average Common Shares Outstanding WeightedAverageCommonSharesOutstanding	298322000	shares
	jef	Weighted Average Common Shares Outstanding WeightedAverageCommonSharesOutstanding	343829000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	310288000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	341434000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	310838000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	353300000	shares
CY2019Q3	jef	Incremental Common Shares Attributable To Redeemable Convertible Preferred Shares IncrementalCommonSharesAttributableToRedeemableConvertiblePreferredShares	0	shares
CY2018Q3	jef	Incremental Common Shares Attributable To Redeemable Convertible Preferred Shares IncrementalCommonSharesAttributableToRedeemableConvertiblePreferredShares	4162000	shares
	jef	Incremental Common Shares Attributable To Redeemable Convertible Preferred Shares IncrementalCommonSharesAttributableToRedeemableConvertiblePreferredShares	4162000	shares
	jef	Incremental Common Shares Attributable To Redeemable Convertible Preferred Shares IncrementalCommonSharesAttributableToRedeemableConvertiblePreferredShares	0	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	311897000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	350307000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	317181000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	357169000	shares
CY2019Q3	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	2018000	shares
CY2018Q3	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	1888700	shares
	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	1910700	shares
	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	1700700	shares
CY2019Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	500000000.0	USD
	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	17725361	shares
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	352100000	USD
CY2019Q3	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	147900000	USD
CY2019Q3	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	9250000	shares
CY2019Q3	us-gaap	Contractual Obligation Future Minimum Payments Due Remainder Of Fiscal Year ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear	7204500000	USD
CY2019Q3	us-gaap	Contractual Obligation Due In Second Year ContractualObligationDueInSecondYear	396300000	USD
CY2019Q3	jef	Contractual Obligation Due In Third And Fourth Years ContractualObligationDueInThirdAndFourthYears	207600000	USD
CY2019Q3	jef	Contractual Obligation Due In Fifth And Sixth Years ContractualObligationDueInFifthAndSixthYears	12000000.0	USD
CY2019Q3	jef	Contractual Obligation Due In Seventh Year And Thereafter ContractualObligationDueInSeventhYearAndThereafter	22500000	USD
CY2019Q3	us-gaap	Contractual Obligation ContractualObligation	7842900000	USD
CY2019Q3	jef	Outstanding Loan Commitmentsto Clients OutstandingLoanCommitmentstoClients	66100000	USD
CY2019Q3	jef	Derivative Contracts Meeting Definitionof A Guarantee DerivativeContractsMeetingDefinitionofAGuarantee	239000000.0	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Before Income Tax Attributable To Parent DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTaxAttributableToParent	140000000.0	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	Segment
CY2019Q3	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	856778000	USD
CY2018Q3	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	1150846000	USD
	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	2786878000	USD
	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	2957440000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	13263000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	272692000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	246059000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	347970000	USD
CY2019Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	39880000	USD
CY2018Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	32295000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	110600000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	92360000	USD

Files In Submission

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$JEF
Jefferies Financial Group Inc. Stock $jef

2019 Q3 Form 10-Q Financial Statement

#000009622319000042 Filed on October 08, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JEF Jefferies Financial Group Inc. Stock $jef

2019 Q3 Form 10-Q Financial Statement

#000009622319000042 Filed on October 08, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JEF
Jefferies Financial Group Inc. Stock $jef