$SNEX
StoneX Group Inc. Stock $snex

$snex Overview Financials Valuation SEC Filings Company Website

2020 Q3 Form 10-K Financial Statement

#000091376020000206 Filed on December 14, 2020

Income Statement

Concept	2020 Q3	2019 Q3	2019 Q2
Revenue	$14.28B	$11.28B	$7.873B
YoY Change	26.64%	85.56%	10.6%
Cost Of Revenue	$13.97B	$10.99B	$7.590B
YoY Change	27.07%	88.37%	10.66%
Gross Profit	$342.1M	$286.9M	$283.4M
YoY Change	19.24%	17.97%	9.08%
Gross Profit Margin	2.39%	2.54%	3.6%
Selling, General & Admin	$250.0M	$160.0M	$167.0M
YoY Change	56.25%	7.38%	9.15%
% of Gross Profit	73.08%	55.77%	58.93%
Research & Development			$9.800M
YoY Change			13.95%
% of Gross Profit			3.46%
Depreciation & Amortization	$7.200M	$4.400M	$3.500M
YoY Change	63.64%	37.5%	25.0%
% of Gross Profit	2.1%	1.53%	1.24%
Operating Expenses	$237.0M	$212.0M	$9.800M
YoY Change	11.79%	7.61%	13.95%
Operating Profit	$105.1M	$74.90M	$273.6M
YoY Change	40.32%	62.12%	8.92%
Interest Expense	$10.00M	$37.20M	$39.40M
YoY Change	-73.12%	47.04%	78.28%
% of Operating Profit	9.51%	49.67%	14.4%
Other Income/Expense, Net			$2.700M
YoY Change			58.82%
Pretax Income	$79.90M	$34.10M	$21.60M
YoY Change	134.31%	66.34%	-34.35%
Income Tax	$2.500M	$6.900M	$5.300M
% Of Pretax Income	3.13%	20.23%	24.54%
Net Earnings	$77.40M	$27.20M	$16.30M
YoY Change	184.56%	73.25%	-32.08%
Net Earnings / Revenue	0.54%	0.24%	0.21%
Basic Earnings Per Share	$4.00	$1.42	$0.85
Diluted Earnings Per Share	$3.90	$1.40	$0.84
COMMON SHARES
Basic Shares Outstanding	19.37M shares	19.16M shares	18.78M shares
Diluted Shares Outstanding			19.01M shares

Balance Sheet

Concept	2020 Q3	2019 Q3	2019 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$953.0M	$471.0M	$345.0M
YoY Change	102.34%	37.72%	-0.86%
Cash & Equivalents	$952.6M	$471.3M	$2.629B
Short-Term Investments
Other Short-Term Assets	$5.550B
YoY Change
Inventory	$281.1M	$229.3M	$347.8M
Prepaid Expenses
Receivables	$411.0M	$422.0M	$283.0M
Other Receivables	$17.00M	$6.000M	$1.000M
Total Short-Term Assets	$6.931B	$899.0M	$629.0M
YoY Change	670.97%	42.7%	10.93%
LONG-TERM ASSETS
Property, Plant & Equipment	$62.10M	$43.90M	$45.70M
YoY Change	41.46%	3.54%	11.46%
Goodwill	$54.70M	$51.20M	$53.70M
YoY Change	6.84%	5.79%	17.25%
Intangibles	$54.80M	$16.70M	$12.20M
YoY Change	228.14%	46.49%	15.09%
Long-Term Investments	$5.864B	$5.023B	$5.137B
YoY Change	16.74%	59.41%	74.19%
Other Assets	$37.00M	$3.608B	$3.763B
YoY Change	-98.97%	-1.5%	10.64%
Total Long-Term Assets	$6.544B	$9.037B	$9.426B
YoY Change	-27.59%	25.61%	40.31%
TOTAL ASSETS
Total Short-Term Assets	$6.931B	$899.0M	$629.0M
Total Long-Term Assets	$6.544B	$9.037B	$9.426B
Total Assets	$13.47B	$9.936B	$10.05B
YoY Change	35.62%	26.98%	38.02%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$6.227B	$3.856B	$3.820B
YoY Change	61.49%	3.41%	9.58%
Accrued Expenses	$119.0M
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$4.597B	$4.234B	$4.142B
YoY Change	8.57%	1159.37%	1230.98%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$10.97B	$8.100B	$7.972B
YoY Change	35.38%	36.07%	50.36%
LONG-TERM LIABILITIES
Long-Term Debt	$784.0M	$370.0M	$507.0M
YoY Change	111.89%	4.23%	40.44%
Other Long-Term Liabilities	$686.0M	$715.0M	$861.0M
YoY Change	-4.06%	-17.53%	-14.5%
Total Long-Term Liabilities	$1.470B	$1.085B	$1.368B
YoY Change	35.48%	-11.21%	0.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$10.97B	$8.100B	$7.972B
Total Long-Term Liabilities	$1.470B	$1.085B	$1.368B
Total Liabilities	$12.71B	$9.342B	$9.484B
YoY Change	36.03%	27.63%	39.53%
SHAREHOLDERS EQUITY
Retained Earnings	$572.4M	$402.1M	$374.9M
YoY Change	42.35%	26.85%	24.43%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$57.60M	$50.10M	$46.30M
YoY Change	14.97%	8.21%	0.0%
Treasury Stock Shares	2.422M shares	2.222M shares	2.122M shares
Shareholders Equity	$767.5M	$594.2M	$571.0M
YoY Change
Total Liabilities & Shareholders Equity	$13.47B	$9.936B	$10.05B
YoY Change	35.62%	26.98%	38.02%

Cashflow Statement

Concept	2020 Q3	2019 Q3	2019 Q2
OPERATING ACTIVITIES
Net Income	$77.40M	$27.20M	$16.30M
YoY Change	184.56%	73.25%	-32.08%
Depreciation, Depletion And Amortization	$7.200M	$4.400M	$3.500M
YoY Change	63.64%	37.5%	25.0%
Cash From Operating Activities	$743.4M	-$130.0M	$462.5M
YoY Change	-671.85%	-122.76%	-216.68%
INVESTING ACTIVITIES
Capital Expenditures	-$11.10M	-$1.600M	-$3.000M
YoY Change	593.75%	-50.0%	25.0%
Acquisitions
YoY Change
Other Investing Activities	-$215.2M	-$900.0K	-$20.20M
YoY Change	23811.11%	-68.97%
Cash From Investing Activities	-$226.3M	-$2.500M	-$23.20M
YoY Change	8952.0%	-59.02%	866.67%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-146.0M	-141.0M	78.60M
YoY Change	3.55%	2511.11%	289.11%
NET CHANGE
Cash From Operating Activities	743.4M	-130.0M	462.5M
Cash From Investing Activities	-226.3M	-2.500M	-23.20M
Cash From Financing Activities	-146.0M	-141.0M	78.60M
Net Change In Cash	371.1M	-273.5M	517.9M
YoY Change	-235.69%	-148.87%	-236.79%
FREE CASH FLOW
Cash From Operating Activities	$743.4M	-$130.0M	$462.5M
Capital Expenditures	-$11.10M	-$1.600M	-$3.000M
Free Cash Flow	$754.5M	-$128.4M	$465.5M
YoY Change	-687.62%	-122.35%	-218.15%

Facts In Submission

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CY2020	dei	Entity File Number EntityFileNumber	000-23554
CY2020	dei	Entity Registrant Name EntityRegistrantName	StoneX Group Inc.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
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CY2020	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	12200000	USD
CY2019	us-gaap	Occupancy Net OccupancyNet	19400000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	16500000	USD
CY2019	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	5200000	USD
CY2018	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	6200000	USD
CY2020	us-gaap	Travel And Entertainment Expense TravelAndEntertainmentExpense	8900000	USD
CY2019	us-gaap	Travel And Entertainment Expense TravelAndEntertainmentExpense	16200000	USD
CY2018	us-gaap	Travel And Entertainment Expense TravelAndEntertainmentExpense	13800000	USD
CY2020	us-gaap	Communication Communication	7000000.0	USD
CY2019	us-gaap	Communication Communication	6600000	USD
CY2018	us-gaap	Communication Communication	5400000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	19700000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	14000000.0	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	11600000	USD
CY2020	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	18700000	USD
CY2019	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	2500000	USD
CY2019	us-gaap	Provision For Other Losses ProvisionForOtherLosses	-12400000	USD
CY2018	us-gaap	Provision For Other Losses ProvisionForOtherLosses	1000000.0	USD
CY2018	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	3100000	USD
CY2020	us-gaap	Provision For Other Losses ProvisionForOtherLosses	0	USD
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	29600000	USD
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	23200000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	20100000	USD
CY2020	us-gaap	Noninterest Expense NoninterestExpense	743200000	USD
CY2019	us-gaap	Noninterest Expense NoninterestExpense	547700000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	482100000	USD
CY2020	intl	Gain Loss On Acquisitions And Other GainLossOnAcquisitionsAndOther	81900000	USD
CY2019	intl	Gain Loss On Acquisitions And Other GainLossOnAcquisitionsAndOther	5500000	USD
CY2018	intl	Gain Loss On Acquisitions And Other GainLossOnAcquisitionsAndOther	2000000.0	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	206700000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	111000000.0	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	101500000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	37100000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25900000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46000000.0	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	169600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	85100000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	55500000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.78
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.46
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.93
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.61
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.39
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.87
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18824328	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18738905	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18549011	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19180479	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19014395	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18934830	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	169600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	85100000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	55500000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-4500000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-800000	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-9000000.0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	200000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	800000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	-300000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	200000	USD
CY2018	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
CY2020	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-100000	USD
CY2019	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	100000	USD
CY2018	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4600000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1700000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8600000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	165000000.0	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	83400000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	46900000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	169600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	85100000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	55500000	USD
CY2020	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	0	USD
CY2019	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	-2400000	USD
CY2018	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	1000000.0	USD
CY2020	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	19700000	USD
CY2018	us-gaap	Increase Decrease In Brokerage Receivables IncreaseDecreaseInBrokerageReceivables	292900000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-900000	USD
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	14000000.0	USD
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	11600000	USD
CY2020	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	9900000	USD
CY2020	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	18700000	USD
CY2019	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	2500000	USD
CY2018	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	3100000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4100000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3700000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	22300000	USD
CY2020	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	6500000	USD
CY2019	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1500000	USD
CY2018	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1000000.0	USD
CY2020	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	200000	USD
CY2019	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	300000	USD
CY2018	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	300000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	10300000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	8100000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	6600000	USD
CY2020	us-gaap	Other Noncash Income OtherNoncashIncome	81900000	USD
CY2019	us-gaap	Other Noncash Income OtherNoncashIncome	5500000	USD
CY2018	us-gaap	Other Noncash Income OtherNoncashIncome	0	USD
CY2020	intl	Increase Decrease In Cash Securities And Other Assets Segregated Under Federal And Other Regulations IncreaseDecreaseInCashSecuritiesAndOtherAssetsSegregatedUnderFederalAndOtherRegulations	-293000000.0	USD
CY2019	intl	Increase Decrease In Cash Securities And Other Assets Segregated Under Federal And Other Regulations IncreaseDecreaseInCashSecuritiesAndOtherAssetsSegregatedUnderFederalAndOtherRegulations	-337200000	USD
CY2018	intl	Increase Decrease In Cash Securities And Other Assets Segregated Under Federal And Other Regulations IncreaseDecreaseInCashSecuritiesAndOtherAssetsSegregatedUnderFederalAndOtherRegulations	626700000	USD
CY2020	us-gaap	Increase Decrease In Receivables Under Repurchase Agreements IncreaseDecreaseInReceivablesUnderRepurchaseAgreements	271700000	USD
CY2019	us-gaap	Increase Decrease In Receivables Under Repurchase Agreements IncreaseDecreaseInReceivablesUnderRepurchaseAgreements	553700000	USD
CY2018	us-gaap	Increase Decrease In Receivables Under Repurchase Agreements IncreaseDecreaseInReceivablesUnderRepurchaseAgreements	464900000	USD
CY2020	us-gaap	Increase Decrease In Securities Borrowed IncreaseDecreaseInSecuritiesBorrowed	16800000	USD
CY2019	us-gaap	Increase Decrease In Securities Borrowed IncreaseDecreaseInSecuritiesBorrowed	1197700000	USD
CY2018	us-gaap	Increase Decrease In Securities Borrowed IncreaseDecreaseInSecuritiesBorrowed	138800000	USD
CY2020	us-gaap	Increase Decrease In Brokerage Receivables IncreaseDecreaseInBrokerageReceivables	326000000.0	USD
CY2019	us-gaap	Increase Decrease In Brokerage Receivables IncreaseDecreaseInBrokerageReceivables	241700000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	134300000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	24300000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3300000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	42700000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	6700000	USD
CY2020	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	-1200000	USD
CY2019	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	-900000	USD
CY2018	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	-6800000	USD
CY2020	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	11100000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	4200000	USD
CY2018	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	1300000	USD
CY2020	us-gaap	Increase Decrease In Financial Instruments Used In Operating Activities IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities	552500000	USD
CY2019	us-gaap	Increase Decrease In Financial Instruments Used In Operating Activities IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities	113300000	USD
CY2018	us-gaap	Increase Decrease In Financial Instruments Used In Operating Activities IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities	308700000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	51800000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-3000000.0	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	98700000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3700000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	8300000	USD
CY2018	us-gaap	Increase Decrease In Securities Loaned Transactions IncreaseDecreaseInSecuritiesLoanedTransactions	166800000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	18600000	USD
CY2020	intl	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-9500000	USD
CY2020	us-gaap	Increase Decrease In Payables To Customers IncreaseDecreaseInPayablesToCustomers	2093700000	USD
CY2019	us-gaap	Increase Decrease In Payables To Customers IncreaseDecreaseInPayablesToCustomers	-46800000	USD
CY2018	us-gaap	Increase Decrease In Payables To Customers IncreaseDecreaseInPayablesToCustomers	520000000.0	USD
CY2020	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	270800000	USD
CY2019	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	176400000	USD
CY2018	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	-27800000	USD
CY2020	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-300000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	1800000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	3200000	USD
CY2020	us-gaap	Increase Decrease In Payables Under Repurchase Agreements IncreaseDecreaseInPayablesUnderRepurchaseAgreements	381800000	USD
CY2019	us-gaap	Increase Decrease In Payables Under Repurchase Agreements IncreaseDecreaseInPayablesUnderRepurchaseAgreements	837000000.0	USD
CY2018	us-gaap	Increase Decrease In Payables Under Repurchase Agreements IncreaseDecreaseInPayablesUnderRepurchaseAgreements	543700000	USD
CY2020	us-gaap	Increase Decrease In Securities Loaned Transactions IncreaseDecreaseInSecuritiesLoanedTransactions	-18000000.0	USD
CY2019	us-gaap	Increase Decrease In Securities Loaned Transactions IncreaseDecreaseInSecuritiesLoanedTransactions	1182000000.0	USD
CY2020	us-gaap	Increase Decrease In Financial Instruments Sold Not Yet Purchased IncreaseDecreaseInFinancialInstrumentsSoldNotYetPurchased	-28800000	USD
CY2019	us-gaap	Increase Decrease In Financial Instruments Sold Not Yet Purchased IncreaseDecreaseInFinancialInstrumentsSoldNotYetPurchased	-156100000	USD
CY2018	us-gaap	Increase Decrease In Financial Instruments Sold Not Yet Purchased IncreaseDecreaseInFinancialInstrumentsSoldNotYetPurchased	153900000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1950600000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	195600000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-473600000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	225000000.0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	28900000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	3700000	USD
CY2020	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	USD
CY2019	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	USD
CY2018	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	800000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	16600000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	11900000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	12500000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-241600000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-40800000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-15400000	USD
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	99700000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	-162600000	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	125800000	USD
CY2020	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	608500000	USD
CY2019	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	357200000	USD
CY2018	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	0	USD
CY2020	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	642000000.0	USD
CY2019	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	346700000	USD
CY2018	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	21500000	USD
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	175000000.0	USD
CY2018	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2020	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	9800000	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	6600000	USD
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3300000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	400000	USD
CY2020	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	344800000	USD
CY2019	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
CY2020	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	92100000	USD
CY2019	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
CY2018	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
CY2020	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	400000	USD
CY2019	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	800000	USD
CY2018	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	800000	USD
CY2020	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	900000	USD
CY2019	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2018	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	5500000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	7500000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3800000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	15000000.0	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2287600000	USD
CY2017Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2659800000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	5500000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1200000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2600000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	800000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	312300000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	9600000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	120900000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-4200000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-700000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-4100000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	2017100000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	163700000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-372200000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2451300000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4468400000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2451300000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2287600000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	90400000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	153200000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	78900000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	44000000.0	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	24600000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	22200000	USD
CY2020	intl	Goodwill And Intangible Assets Acquired During Period GoodwillAndIntangibleAssetsAcquiredDuringPeriod	11800000	USD
CY2019	intl	Goodwill And Intangible Assets Acquired During Period GoodwillAndIntangibleAssetsAcquiredDuringPeriod	10800000	USD
CY2018	intl	Goodwill And Intangible Assets Acquired During Period GoodwillAndIntangibleAssetsAcquiredDuringPeriod	3900000	USD
CY2020	intl	Noncash Or Part Noncash Acquisition Additional Consideration Payable NoncashOrPartNoncashAcquisitionAdditionalConsiderationPayable	21600000	USD
CY2019	intl	Noncash Or Part Noncash Acquisition Additional Consideration Payable NoncashOrPartNoncashAcquisitionAdditionalConsiderationPayable	1800000	USD
CY2018	intl	Noncash Or Part Noncash Acquisition Additional Consideration Payable NoncashOrPartNoncashAcquisitionAdditionalConsiderationPayable	0	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	1169200000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	7500000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	47100000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	1700000	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	359500000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	8900000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	1900000	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	809700000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	38200000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	-200000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4468400000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2451300000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2287600000	USD
CY2020Q3	intl	Non Cash Equivalent Segregated Assets NonCashEquivalentSegregatedAssets	13000000.0	USD
CY2019Q3	intl	Non Cash Equivalent Segregated Assets NonCashEquivalentSegregatedAssets	306000000.0	USD
CY2018Q3	intl	Non Cash Equivalent Segregated Assets NonCashEquivalentSegregatedAssets	643200000	USD
CY2020Q3	intl	Non Segregated Cash And Other Non Cash Equivalent Assets Included With In Deposits And Receivables From Broker Dealers Clearing Organizations And Counter Parties NonSegregatedCashAndOtherNonCashEquivalentAssetsIncludedWithInDepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterParties	2021300000	USD
CY2019Q3	intl	Non Segregated Cash And Other Non Cash Equivalent Assets Included With In Deposits And Receivables From Broker Dealers Clearing Organizations And Counter Parties NonSegregatedCashAndOtherNonCashEquivalentAssetsIncludedWithInDepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterParties	1304400000	USD
CY2018Q3	intl	Non Segregated Cash And Other Non Cash Equivalent Assets Included With In Deposits And Receivables From Broker Dealers Clearing Organizations And Counter Parties NonSegregatedCashAndOtherNonCashEquivalentAssetsIncludedWithInDepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterParties	1054700000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	449900000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	55500000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-8600000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1900000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6600000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	505300000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	85100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1700000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1200000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8100000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	3800000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	594200000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	169600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4600000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	5500000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	10300000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	767500000	USD
CY2020Q3	intl	Numberofcommercialandinstitutionalclients Numberofcommercialandinstitutionalclients	32000	client
CY2020Q3	intl	Numberretailclients Numberretailclients	330000	client
CY2020	us-gaap	Fiscal Period FiscalPeriod	Unless otherwise stated herein, all references to fiscal 2020, fiscal 2019, and fiscal 2018 refer to the Company’s fiscal years ended September 30.
CY2020	us-gaap	Use Of Estimates UseOfEstimates	Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The most significant of these estimates and assumptions relate to fair value measurements for financial instruments, revenue recognition, the provision for probable losses from bad debts, valuation of inventories, and incomes taxes and contingencies. These estimates are based on management’s best knowledge of current events and actions the Company may undertake in the future. The Company reviews all significant estimates affecting the financial statements on a recurring basis and records the effect of any necessary adjustments prior to their issuance. Although these and other estimates and assumptions are based on the best available information, actual results could be materially different from these estimates.
CY2020	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Reclassifications</span></div><div style="margin-bottom:5pt;margin-top:5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the year ended September 30, 2020, the Company reclassified certain selling and marketing related costs in connection with the acquisition of Gain Capital Holdings, Inc. (“Gain”). In performing this reclassification, the Company has made retrospective adjustments to the consolidated income statements for the years ended September 30, 2019 and 2018. For the years ended September 30, 2019 and 2018, selling and marketing related costs of $5.2 million and $6.2 million, were reclassified from ‘Other’ expense to ‘Selling and marketing’ expense. </span></div><div style="margin-bottom:5pt;margin-top:5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the year ended September 30, 2019, the Company reclassified certain brokerage related revenues for which the Company earns commissions on trading activity in the capacity of an agent. In performing this reclassification, the Company has made a retrospective adjustment to the consolidated income statement for the year ended September 30, 2018. For the year ended September 30, 2018, brokerage related revenue of $35.0 million, was reclassified from ‘principal gains, net’ to ‘commissions and clearing fees’. Additionally, the Company has changed the name of the line item ‘trading gains, net’ to ‘principal gains, net’ on the consolidated income statement in order to reflect the fact that these revenue streams are earned from trading financial instruments in the capacity of a principal and in order to properly segregate revenues earned from contracts with clients.</span></div>
CY2019	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	5200000	USD
CY2018	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	6200000	USD
CY2019	us-gaap	Amount Recognized In Income Due To Inflationary Accounting AmountRecognizedInIncomeDueToInflationaryAccounting	-3900000	USD
CY2018	us-gaap	Amount Recognized In Income Due To Inflationary Accounting AmountRecognizedInIncomeDueToInflationaryAccounting	-3400000	USD
CY2020Q3	intl	Netassetsdenominatedin Argentine Pesos NetassetsdenominatedinArgentinePesos	-100000	USD
CY2019Q3	intl	Netassetsdenominatedin Argentine Pesos NetassetsdenominatedinArgentinePesos	5500000	USD
CY2020Q3	intl	Cashdenominatedin Argentine Pesos CashdenominatedinArgentinePesos	100000	USD
CY2019Q3	intl	Cashdenominatedin Argentine Pesos CashdenominatedinArgentinePesos	1400000	USD
CY2020Q3	intl	Net Nonmonteary Assets Denominated In Argentine Pesos NetNonmontearyAssetsDenominatedInArgentinePesos	900000	USD
CY2019Q3	intl	Net Nonmonteary Assets Denominated In Argentine Pesos NetNonmontearyAssetsDenominatedInArgentinePesos	1000000.0	USD
CY2020Q3	intl	Cash Heldat Banksand Money Market Funds Segregated CashHeldatBanksandMoneyMarketFundsSegregated	1907200000	USD
CY2019Q3	intl	Cash Heldat Banksand Money Market Funds Segregated CashHeldatBanksandMoneyMarketFundsSegregated	743900000	USD
CY2020Q3	intl	Us Government Obligations And Other Securities UsGovernmentObligationsAndOtherSecurities	10600000	USD
CY2019Q3	intl	Us Government Obligations And Other Securities UsGovernmentObligationsAndOtherSecurities	299800000	USD
CY2020Q3	intl	Commodities Warehouse Receipts CommoditiesWarehouseReceipts	2400000	USD
CY2019Q3	intl	Commodities Warehouse Receipts CommoditiesWarehouseReceipts	6200000	USD
CY2020	us-gaap	Due To And From Broker Dealers And Clearing Organizations Disclosure DueToAndFromBrokerDealersAndClearingOrganizationsDisclosure	<div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Deposits with and Receivables from Broker-dealers, Clearing Organizations and Counterparties, and Payables to Broker-dealers, Clearing Organizations and Counterparties </span></div><div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As required by regulations of the CFTC, FSA, and Monetary Authority of Singapore (“MAS”), client funds received to margin, guarantee, and/or secure commodity futures and futures on options as well as retail foreign exchange transactions are segregated and accounted for separately from the general assets of the Company. Deposits with broker-dealers, clearing organizations, and counterparties pertain primarily to deposits made to satisfy margin requirements on client and proprietary open futures and options on futures positions and to satisfy the requirements set by clearing exchanges for clearing membership. The Company also pledges margin deposits with various counterparties for over-the-counter (“OTC”) derivative contracts, and these deposits are also included in deposits with broker-dealers, clearing organizations, and counterparties. The Company also deposits cash margin with various securities clearing organizations as an ongoing condition of the securities clearing relationships, and these deposits are also included in deposits with broker-dealers, clearing organizations, and counterparties. Deposits with and receivables from broker-dealers, clearing organizations, and counterparties are reported gross, except where a right of offset exists. As of September 30, 2020 and September 30, 2019, the Company had cash and cash equivalents on deposit with or pledged to broker-dealers, clearing organizations, and counterparties of approximately 1.6 billion.</span></div><div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Deposits with and receivables from broker-dealers, clearing organizations, and counterparties also includes guaranty deposits with clearing exchanges. The guaranty deposits are held by the clearing exchanges for use in potential default situations by one </span></div><div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">or more members of the clearing exchanges. The guaranty deposits may be applied to the Company’s obligations to the clearing exchange, or to the clearing exchange’s obligations to unrelated parties. </span></div><div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Deposits with and receivables from broker-dealers, clearing organizations, and counterparties also include securities pledged to clearing exchanges. These securities are either pledged to the Company by its clients or represent investments of client funds. It is the Company’s practice to include client-owned securities on its consolidated balance sheets, as the rights to those securities have been transferred to the Company under the terms of the futures trading agreements. Securities pledged primarily include U.S. Treasury obligations, foreign government obligations, and certain exchange-traded funds (“ETFs”). Securities that are not client-owned, and represent an investment of client funds, are adjusted to fair value with associated changes in unrealized gains or losses recorded in ‘interest income’ in the consolidated income statements. For client-owned securities, the change in fair value is offset against the payable to clients with no impact recognized in the consolidated income statements. The fair value of these securities included within deposits with and receivables from broker-dealers, clearing organizations, and counterparties was $1,949.3 million and $603.8 million as of September 30, 2020 and September 30, 2019, respectively. </span></div><div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Management has considered guidance required by ASC 860, Transfers and Servicing as it relates to securities pledged by clients to margin their futures and options on futures trading accounts. Based on a review of the agreements with the client, management believes the transferor surrenders control over those assets because: (a) the transferred assets have been isolated from the transferor—put presumptively beyond the reach of the transferor and its creditors, even in bankruptcy or other receivership, (b) each transferee has the right to pledge or exchange the assets (or beneficial interests) it received, and no condition both constrains the transferee (or holder) from taking advantage of its right to pledge or exchange and provides more than a trivial benefit to the transferor and (c) the transferor does not maintain effective control over the transferred assets through either (1) an agreement that both entitles and obligates the transferor to repurchase or redeem them before their maturity or (2) the ability to unilaterally cause the holder to return specific assets, other than through a cleanup call. Under this guidance, the Company reflects the client collateral assets and corresponding liabilities in the Company’s consolidated balance sheets as of September 30, 2020 and September 30, 2019. </span></div><div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Deposits with and receivables from broker-dealers, clearing organizations, and counterparties also includes amounts due from clearing exchanges for unrealized gains and losses associated with clients’ options on futures contracts. See discussion in the Financial Instruments section below for additional information on the Company’s accounting policies for derivative contracts. For client-owned derivative contracts, the fair value is offset against the payable to clients with no impact recognized on the consolidated income statements.</span></div><div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company maintains client omnibus and proprietary accounts with other clearing organizations, and the equity balances in those accounts along with any margin cash or securities deposited with the clearing organizations are included in deposits with and receivables from broker-dealers, clearing organizations, and counterparties. </span></div><div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Deposits with and receivables from broker-dealers, clearing organizations, and counterparties also include amounts due from or due to clearing exchanges for daily variation settlements on open futures and options on futures positions. The variation settlements due from or due to clearing exchanges are paid in cash on the following business day. Variation settlements equal the daily settlement of futures contracts and premiums on options on futures contracts.</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Receivables from broker-dealers and counterparties also include amounts receivable for securities sold but not yet delivered by the Company on settlement date (“fails-to-deliver”) and net receivables arising from unsettled proprietary trades.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Payables to broker-dealers and counterparties primarily include amounts payable for securities purchased but not yet received by the Company on settlement date (“fails-to-receive”) and net payables arising from unsettled proprietary trades.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Receivables from broker-dealers, clearing organizations and counterparties, and payables to broker-dealers, clearing organizations and counterparties also include amounts related to the value of registered broker-dealer clients cross-currency payment transactions related to the Global Payments segment. These amounts arise due to a clearing period before the funds are received and payments are made, which usually is one to two business days.</span></div>
CY2020Q3	intl	Cashand Cash Equivalents Depositsand Receivables CashandCashEquivalentsDepositsandReceivables	1600000000	USD
CY2019Q3	intl	Cashand Cash Equivalents Depositsand Receivables CashandCashEquivalentsDepositsandReceivables	1600000000	USD
CY2020Q3	intl	Us Government Securitiesand Other Securities Depositsand Receivables USGovernmentSecuritiesandOtherSecuritiesDepositsandReceivables	1949300000	USD
CY2019Q3	intl	Us Government Securitiesand Other Securities Depositsand Receivables USGovernmentSecuritiesandOtherSecuritiesDepositsandReceivables	603800000	USD
CY2020	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P1Y
CY2020Q3	intl	Fair Valueof Exchange Memberships FairValueofExchangeMemberships	6700000	USD
CY2019Q3	intl	Fair Valueof Exchange Memberships FairValueofExchangeMemberships	6000000.0	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	15300000	USD
CY2020Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2020Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	12100000	USD
CY2020Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q3	intl	Cumulative Effect New Accounting Principle In Period Of Adoption CumulativeEffectNewAccountingPrincipleInPeriodOfAdoption	700000	USD
CY2020Q3	intl	Lessee Operating Lease Minimum Number Of Options To Renew LesseeOperatingLeaseMinimumNumberOfOptionsToRenew	1	officeSpace
CY2020	intl	Lessee Operating Lease Termination Period LesseeOperatingLeaseTerminationPeriod	P2Y
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	101500000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	118700000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	33100000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	36200000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	17200000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	96400000	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P11Y3M18D
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.043
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	16000000.0	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	13600000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	11800000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	11000000.0	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	82600000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	150300000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	31600000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	118700000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	11200000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	9900000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	7500000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	6200000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	5800000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	2600000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	43200000	USD
CY2020	intl	Revenues From Contracts With Clients As A Of Total Revenues RevenuesFromContractsWithClientsAsAOfTotalRevenues	0.009
CY2019	intl	Revenues From Contracts With Clients As A Of Total Revenues RevenuesFromContractsWithClientsAsAOfTotalRevenues	0.014
CY2018	intl	Revenues From Contracts With Clients As A Of Total Revenues RevenuesFromContractsWithClientsAsAOfTotalRevenues	0.017
CY2020	intl	Revenues From Contracts With Clients As A Of Operating Revenues RevenuesFromContractsWithClientsAsAOfOperatingRevenues	0.372
CY2019	intl	Revenues From Contracts With Clients As A Of Operating Revenues RevenuesFromContractsWithClientsAsAOfOperatingRevenues	0.409
CY2018	intl	Revenues From Contracts With Clients As A Of Operating Revenues RevenuesFromContractsWithClientsAsAOfOperatingRevenues	0.474
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	487300000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	452000000.0	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	462900000	USD
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	487300000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	452000000.0	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	462900000	USD
CY2020	us-gaap	Principal Transactions Revenue PrincipalTransactionsRevenue	622200000	USD
CY2019	us-gaap	Principal Transactions Revenue PrincipalTransactionsRevenue	415800000	USD
CY2018	us-gaap	Principal Transactions Revenue PrincipalTransactionsRevenue	354100000	USD
CY2020	us-gaap	Interest Income Operating InterestIncomeOperating	130900000	USD
CY2019	us-gaap	Interest Income Operating InterestIncomeOperating	198900000	USD
CY2018	us-gaap	Interest Income Operating InterestIncomeOperating	123300000	USD
CY2020	us-gaap	Revenues Revenues	54139600000	USD
CY2019	us-gaap	Revenues Revenues	32897000000.0	USD
CY2018	us-gaap	Revenues Revenues	27622700000	USD
CY2020	intl	Revenue Term Of Risk Management Consulting Contract RevenueTermOfRiskManagementConsultingContract	P6M
CY2020	intl	Revenue Term Of Risk Management Consulting Contract RevenueTermOfRiskManagementConsultingContract	P6M
CY2020	intl	Revenue Term Of Risk Management Consulting Contract RevenueTermOfRiskManagementConsultingContract	P6M
CY2020	intl	Revenue Term Of Risk Management Consulting Contract RevenueTermOfRiskManagementConsultingContract	P6M
CY2020	intl	Revenue Term Of Risk Management Consulting Contract RevenueTermOfRiskManagementConsultingContract	P6M
CY2020	intl	Revenue Term Of Risk Management Consulting Contract RevenueTermOfRiskManagementConsultingContract	P6M
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	169600000	USD
CY2019	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	85100000	USD
CY2018	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	55500000	USD
CY2020	intl	Undistributed Earnings Allocatedto Participating Securities Continuing Operations UndistributedEarningsAllocatedtoParticipatingSecuritiesContinuingOperations	4000000.0	USD
CY2019	intl	Undistributed Earnings Allocatedto Participating Securities Continuing Operations UndistributedEarningsAllocatedtoParticipatingSecuritiesContinuingOperations	1500000	USD
CY2018	intl	Undistributed Earnings Allocatedto Participating Securities Continuing Operations UndistributedEarningsAllocatedtoParticipatingSecuritiesContinuingOperations	900000	USD
CY2020	intl	Incomefromcontinuingoperationsallocatedtocommonshareholders Incomefromcontinuingoperationsallocatedtocommonshareholders	165600000	USD
CY2019	intl	Incomefromcontinuingoperationsallocatedtocommonshareholders Incomefromcontinuingoperationsallocatedtocommonshareholders	83600000	USD
CY2018	intl	Incomefromcontinuingoperationsallocatedtocommonshareholders Incomefromcontinuingoperationsallocatedtocommonshareholders	54600000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18824328	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18738905	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18549011	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	356151	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	275490	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	385819	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19180479	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19014395	shares
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	25800000	USD
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18934830	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	898420	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	907089	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	92627	shares
CY2020Q3	us-gaap	Financial Instruments Sold Not Yet Purchased At Fair Value FinancialInstrumentsSoldNotYetPurchasedAtFairValue	686000000.0	USD
CY2019Q3	us-gaap	Financial Instruments Sold Not Yet Purchased At Fair Value FinancialInstrumentsSoldNotYetPurchasedAtFairValue	714800000	USD
CY2020	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	900000	USD
CY2020	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	-600000	USD
CY2020Q3	intl	Equity Investments In Exchange Stock Cost EquityInvestmentsInExchangeStockCost	3700000	USD
CY2019Q3	intl	Equity Investments In Exchange Stock Cost EquityInvestmentsInExchangeStockCost	3700000	USD
CY2020Q3	us-gaap	Senior Notes SeniorNotes	336000000.0	USD
CY2020Q3	us-gaap	Financial Instruments Sold Not Yet Purchased At Fair Value FinancialInstrumentsSoldNotYetPurchasedAtFairValue	686000000.0	USD
CY2020Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	3264400000	USD
CY2020Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	3069500000	USD
CY2019Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	3671500000	USD
CY2019Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	3604500000	USD
CY2020Q3	us-gaap	Derivative Asset Fair Value Gross Liability And Obligation To Return Cash Offset DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset	3319000000.0	USD
CY2020Q3	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	3100700000	USD
CY2019Q3	us-gaap	Derivative Asset Fair Value Gross Liability And Obligation To Return Cash Offset DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset	3581900000	USD
CY2019Q3	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	3540800000	USD
CY2020Q3	us-gaap	Derivative Number Of Instruments Held DerivativeNumberOfInstrumentsHeld	7900000	position
CY2019Q3	us-gaap	Derivative Number Of Instruments Held DerivativeNumberOfInstrumentsHeld	10600000	position
CY2020Q3	intl	Allowance For Doubtful Accounts Depositswithand Receivablesfrom Broker Dealers Clearings Organizationsand Counterparties AllowanceForDoubtfulAccountsDepositswithandReceivablesfromBrokerDealersClearingsOrganizationsandCounterparties	1300000	USD
CY2019Q3	intl	Allowance For Doubtful Accounts Depositswithand Receivablesfrom Broker Dealers Clearings Organizationsand Counterparties AllowanceForDoubtfulAccountsDepositswithandReceivablesfromBrokerDealersClearingsOrganizationsandCounterparties	36900000	USD
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	35600000	USD
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	11700000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	0	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	0	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	13000000.0	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2500000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	2600000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	300000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	400000	USD
CY2019	us-gaap	Provision For Other Losses ProvisionForOtherLosses	-12400000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3100000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	2900000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	300000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	100000	USD
CY2018	us-gaap	Provision For Other Losses ProvisionForOtherLosses	1000000.0	USD
CY2019Q3	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	48600000	USD
CY2018Q3	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	58200000	USD
CY2017Q3	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	54600000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	13000000.0	USD
CY2019	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	-9800000	USD
CY2018	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	3900000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	35600000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	1300000	USD
CY2018	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	300000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	1100000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	1500000	USD
CY2018	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	0	USD
CY2020Q3	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	27100000	USD
CY2019Q3	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	48600000	USD
CY2018Q3	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	58200000	USD
CY2020Q3	us-gaap	Agricultural Related Inventory AgriculturalRelatedInventory	201500000	USD
CY2020Q3	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	38300000	USD
CY2019Q3	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	20300000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	107900000	USD
CY2020	us-gaap	Capitalized Computer Software Impairments1 CapitalizedComputerSoftwareImpairments1	5700000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	92900000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	45800000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	49000000.0	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	62100000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	43900000	USD
CY2019Q3	us-gaap	Agricultural Related Inventory AgriculturalRelatedInventory	144800000	USD
CY2020Q3	us-gaap	Inventory Net InventoryNet	281100000	USD
CY2019Q3	us-gaap	Inventory Net InventoryNet	229300000	USD
CY2020	us-gaap	Depreciation Depreciation	13300000	USD
CY2019	us-gaap	Depreciation Depreciation	11200000	USD
CY2018	us-gaap	Depreciation Depreciation	9400000	USD
CY2020Q3	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	10200000	USD
CY2019Q3	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	10600000	USD
CY2020Q3	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	28600000	USD
CY2019Q3	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	33900000	USD
CY2020Q3	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	30800000	USD
CY2019Q3	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	28100000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	54700000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	51200000	USD
CY2020	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	100000	USD
CY2019	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	0	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	70900000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	21400000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	49500000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	27400000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	15500000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	11900000	USD
CY2020Q3	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	5300000	USD
CY2020Q3	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	5300000	USD
CY2020Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	54800000	USD
CY2019Q3	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	32200000	USD
CY2019Q3	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	4800000	USD
CY2019Q3	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	4800000	USD
CY2020Q3	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	76200000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	21400000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	15500000	USD
CY2019Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	16700000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5800000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2800000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2300000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	15100000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	13800000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	12200000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	4700000	USD
CY2020Q3	intl	Finite Lived Intangible Assets Amortization Expense After Year Four FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour	3700000	USD
CY2020Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	180100000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	49500000	USD
CY2020Q3	intl	Number Of Credit Facilities NumberOfCreditFacilities	4	facility
CY2020Q3	intl	Maximum Borrowing Capacity Under Credit Facilities MaximumBorrowingCapacityUnderCreditFacilities	736600000	USD
CY2020	us-gaap	Line Of Credit Facility Expiration Period LineOfCreditFacilityExpirationPeriod	P3Y
CY2020	intl	Maximum Available Under Credit Facility MaximumAvailableUnderCreditFacility	393000000.0	USD
CY2020	intl	Termloanperiodicprincipalpaymentpercentage Termloanperiodicprincipalpaymentpercentage	0.0125
CY2020	us-gaap	Debt Instrument Periodic Payment Principal DebtInstrumentPeriodicPaymentPrincipal	9800000	USD
CY2020Q3	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	20000000.0	USD
CY2020Q3	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	0	USD
CY2019Q3	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	0	USD
CY2015Q2	us-gaap	Notes Payable To Bank NotesPayableToBank	4000000.0	USD
CY2020Q3	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0200
CY2020Q2	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	350000000	USD
CY2020Q2	intl	Debt Instrument Discount Rate At Issuance Of Face Value DebtInstrumentDiscountRateAtIssuanceOfFaceValue	0.985
CY2020Q3	intl	Debt Instrument Discount Rate At Issuance Of Face Value DebtInstrumentDiscountRateAtIssuanceOfFaceValue	0.08625
CY2020Q3	us-gaap	Deferred Finance Costs Gross DeferredFinanceCostsGross	9500000	USD
CY2020	us-gaap	Debt Instrument Redemption Price Percentage Of Principal Amount Redeemed DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed	0.40
CY2020Q2	us-gaap	Debt Instrument Redemption Price Percentage DebtInstrumentRedemptionPricePercentage	1.08625
CY2020Q3	us-gaap	Debt Instrument Redemption Price Percentage DebtInstrumentRedemptionPricePercentage	1
CY2020Q3	intl	Debt Instrument Remaining Outstanding DebtInstrumentRemainingOutstanding	500000	USD
CY2020	us-gaap	Debt Instrument Redemption Price Percentage DebtInstrumentRedemptionPricePercentage	1
CY2020Q1	intl	Senior Secured Bridge Loan SeniorSecuredBridgeLoan	350000000	USD
CY2020Q1	intl	Non Refundable Commitment Fee NonRefundableCommitmentFee	4400000	USD
CY2020Q3	intl	Maximum Borrowing Capacity Under Credit Facilities MaximumBorrowingCapacityUnderCreditFacilities	736600000	USD
CY2020Q3	intl	Amount Outstanding On Committed Credit Facilities AmountOutstandingOnCommittedCreditFacilities	427600000	USD
CY2019Q3	intl	Amount Outstanding On Committed Credit Facilities AmountOutstandingOnCommittedCreditFacilities	366100000	USD
CY2020Q3	us-gaap	Notes Payable To Bank NotesPayableToBank	0	USD
CY2019Q3	us-gaap	Notes Payable To Bank NotesPayableToBank	400000	USD
CY2020Q3	us-gaap	Senior Notes SeniorNotes	336000000.0	USD
CY2019Q3	us-gaap	Senior Notes SeniorNotes	0	USD
CY2020Q3	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	783600000	USD
CY2019Q3	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	369900000	USD
CY2020Q3	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	500000	USD
CY2019Q3	us-gaap	Loss Contingency Range Of Possible Loss Portion Not Accrued LossContingencyRangeOfPossibleLossPortionNotAccrued	29000000.0	USD
CY2019Q3	intl	Loss Contingency Individual Accounts Maximum Receivable LossContingencyIndividualAccountsMaximumReceivable	1400000	USD
CY2020Q3	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	5230900000	USD
CY2020Q3	us-gaap	Purchase Obligation Due In Second And Third Year PurchaseObligationDueInSecondAndThirdYear	19200000	USD
CY2020Q3	us-gaap	Purchase Obligation Due In Fourth And Fifth Year PurchaseObligationDueInFourthAndFifthYear	17200000	USD
CY2020Q3	us-gaap	Purchase Obligation Due After Fifth Year PurchaseObligationDueAfterFifthYear	3200000	USD
CY2020Q3	us-gaap	Other Commitment Due In Next Twelve Months OtherCommitmentDueInNextTwelveMonths	5162400000	USD
CY2020	intl	Self Insurance Stop Loss Coverage Claims Threshold Percent SelfInsuranceStopLossCoverageClaimsThresholdPercent	1.20
CY2020Q3	us-gaap	Self Insurance Reserve SelfInsuranceReserve	1100000	USD
CY2019Q3	us-gaap	Self Insurance Reserve SelfInsuranceReserve	800000	USD
CY2020Q3	srt	Net Capital Under Commodity Exchange Act Computation NetCapitalUnderCommodityExchangeActComputation	20000000.0	USD
CY2020Q3	srt	Required Net Capital Under Commodity Exchange Act1 RequiredNetCapitalUnderCommodityExchangeAct1	10000000.0	USD
CY2020Q3	us-gaap	Pledged Assets Separately Reported Securities Pledged For Repurchase Agreements At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedForRepurchaseAgreementsAtFairValue	1484700000	USD
CY2019Q3	us-gaap	Pledged Assets Separately Reported Securities Pledged For Repurchase Agreements At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedForRepurchaseAgreementsAtFairValue	1175100000	USD
CY2020Q3	us-gaap	Securities Loaned Fair Value Of Collateral SecuritiesLoanedFairValueOfCollateral	1410300000	USD
CY2020Q3	srt	Minimum Net Capital Required For Broker Dealer Subsidiary1 MinimumNetCapitalRequiredForBrokerDealerSubsidiary1	5000000.0	USD
CY2020Q3	srt	Minimum Net Capital Required For Broker Dealer Subsidiary1 MinimumNetCapitalRequiredForBrokerDealerSubsidiary1	5000000.0	USD
CY2020Q3	us-gaap	Financial Instruments Owned And Pledged As Collateral Amount Eligible To Be Repledged By Counterparty FinancialInstrumentsOwnedAndPledgedAsCollateralAmountEligibleToBeRepledgedByCounterparty	468600000	USD
CY2019Q3	us-gaap	Financial Instruments Owned And Pledged As Collateral Amount Eligible To Be Repledged By Counterparty FinancialInstrumentsOwnedAndPledgedAsCollateralAmountEligibleToBeRepledgedByCounterparty	478800000	USD
CY2020Q3	us-gaap	Financial Instruments Owned And Pledged As Collateral Amount Not Eligible To Be Repledged By Counterparty FinancialInstrumentsOwnedAndPledgedAsCollateralAmountNotEligibleToBeRepledgedByCounterparty	1266400000	USD
CY2019Q3	us-gaap	Financial Instruments Owned And Pledged As Collateral Amount Not Eligible To Be Repledged By Counterparty FinancialInstrumentsOwnedAndPledgedAsCollateralAmountNotEligibleToBeRepledgedByCounterparty	1228900000	USD
CY2019Q3	us-gaap	Securities Loaned Fair Value Of Collateral SecuritiesLoanedFairValueOfCollateral	1414000000.0	USD
CY2020Q3	us-gaap	Fair Value Of Securities Received As Collateral That Can Be Resold Or Repledged FairValueOfSecuritiesReceivedAsCollateralThatCanBeResoldOrRepledged	3303100000	USD
CY2019Q3	us-gaap	Fair Value Of Securities Received As Collateral That Can Be Resold Or Repledged FairValueOfSecuritiesReceivedAsCollateralThatCanBeResoldOrRepledged	3060200000	USD
CY2020Q3	us-gaap	Fair Value Of Securities Received As Collateral That Have Been Resold Or Repledged FairValueOfSecuritiesReceivedAsCollateralThatHaveBeenResoldOrRepledged	285700000	USD
CY2019Q3	us-gaap	Fair Value Of Securities Received As Collateral That Have Been Resold Or Repledged FairValueOfSecuritiesReceivedAsCollateralThatHaveBeenResoldOrRepledged	329800000	USD
CY2020Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	3155500000	USD
CY2020Q3	us-gaap	Securities Loaned SecuritiesLoaned	1441900000	USD
CY2020Q3	us-gaap	Collateralized Financings CollateralizedFinancings	4597400000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	2773700000	USD
CY2019Q3	us-gaap	Securities Loaned SecuritiesLoaned	1459900000	USD
CY2019Q3	us-gaap	Collateralized Financings CollateralizedFinancings	4233600000	USD
CY2020Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	3155500000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	2773700000	USD
CY2020Q3	us-gaap	Securities Loaned SecuritiesLoaned	1441900000	USD
CY2019Q3	us-gaap	Securities Loaned SecuritiesLoaned	1459900000	USD
CY2020Q3	us-gaap	Collateralized Financings CollateralizedFinancings	4597400000	USD
CY2019Q3	us-gaap	Collateralized Financings CollateralizedFinancings	4233600000	USD
CY2020Q3	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	1696200000	USD
CY2020Q3	us-gaap	Securities Purchased Under Agreements To Resell Liability SecuritiesPurchasedUnderAgreementsToResellLiability	0	USD
CY2020Q3	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	1696200000	USD
CY2020Q3	us-gaap	Securities Borrowed Gross SecuritiesBorrowedGross	1440000000.0	USD
CY2020Q3	us-gaap	Securities Borrowed Liability SecuritiesBorrowedLiability	0	USD
CY2020Q3	us-gaap	Securities Borrowed SecuritiesBorrowed	1440000000.0	USD
CY2020Q3	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	3155500000	USD
CY2020Q3	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	0	USD
CY2020Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	3155500000	USD
CY2020Q3	us-gaap	Securities Loaned Gross SecuritiesLoanedGross	1441900000	USD
CY2020Q3	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	0	USD
CY2020Q3	us-gaap	Securities Loaned SecuritiesLoaned	1441900000	USD
CY2019Q3	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	1474400000	USD
CY2019Q3	us-gaap	Securities Purchased Under Agreements To Resell Liability SecuritiesPurchasedUnderAgreementsToResellLiability	49900000	USD
CY2019Q3	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	1424500000	USD
CY2019Q3	us-gaap	Securities Borrowed Gross SecuritiesBorrowedGross	1423200000	USD
CY2019Q3	us-gaap	Securities Borrowed Liability SecuritiesBorrowedLiability	0	USD
CY2019Q3	us-gaap	Securities Borrowed SecuritiesBorrowed	1423200000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	2823600000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	49900000	USD
CY2019Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	2773700000	USD
CY2019Q3	us-gaap	Securities Loaned Gross SecuritiesLoanedGross	1459900000	USD
CY2019Q3	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	0	USD
CY2019Q3	us-gaap	Securities Loaned SecuritiesLoaned	1459900000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	10300000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8100000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6600000	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	2000000.0	shares
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	700000	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.27
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.30
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0186
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0123
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P0Y
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y18D
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P3Y21D
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	0.00
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	10.47
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	9.79
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	692652	shares
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1684378	shares
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	37.59
CY2019Q3	intl	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue	11.32
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y7M13D
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	9200000	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	423112	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Other Increases Decreases In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriod	244511	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	30.56
CY2020	intl	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageGrantDateFairValue	11.36
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	13662	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	13662	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	39.64
CY2020	intl	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeited In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue	8.62
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	18169	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	18169	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	37.30
CY2020	intl	Share Based Compensation Arrangement By Share Based Payment Award Options Expired In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpiredInPeriodWeightedAverageGrantDateFairValue	8.19
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	724483	shares
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1408036	shares
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	38.79
CY2020Q3	intl	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue	11.38
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y1M28D
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	17400000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	4200000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	700000	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	29.25
CY2020Q3	intl	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageGrantDateFairValue	12.64
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y4M17D
CY2020Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	9300000	USD
CY2020Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	7200000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P5Y4M6D
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2100000	USD
CY2020Q3	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	1408036	shares
CY2020Q3	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	38.79
CY2020	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P4Y1M28D
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Shares Issued In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod	1500000	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Granted ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted	900000	shares
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber	1156902	shares
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	350778	shares
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	40.06
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms	P1Y4M9D
CY2019Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Intrinsic Value Outstanding SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding	14400000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Period Increase Decrease ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsPeriodIncreaseDecrease	-299858	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	299858	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	44.94
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	161880	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	40.26
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Forfeitures ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures	4410	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	4410	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	44.23
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber	861454	shares
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	484346	shares
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	42.97
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms	P1Y4M13D
CY2020Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Intrinsic Value Outstanding SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding	24800000	USD
CY2020Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	15600000	USD
CY2020	intl	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition Restricted Stock EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognitionRestrictedStock	P1Y4M13D
CY2020	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	400000	USD
CY2019	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	100000	USD
CY2018	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	200000	USD
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0435
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	100000	USD
CY2020	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	100000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	2100000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	2100000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	2100000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	2100000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	2000000.0	USD
CY2020Q3	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	9500000	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	10100000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	7500000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	6800000	USD
CY2019	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	4600000	USD
CY2020	us-gaap	General Insurance Expense GeneralInsuranceExpense	4700000	USD
CY2019	us-gaap	General Insurance Expense GeneralInsuranceExpense	3400000	USD
CY2018	us-gaap	General Insurance Expense GeneralInsuranceExpense	2600000	USD
CY2020	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	1800000	USD
CY2019	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	1900000	USD
CY2018	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	1700000	USD
CY2020	us-gaap	Clearance Fees ClearanceFees	2800000	USD
CY2019	us-gaap	Clearance Fees ClearanceFees	2500000	USD
CY2018	us-gaap	Clearance Fees ClearanceFees	2500000	USD
CY2020	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	6600000	USD
CY2018	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	4900000	USD
CY2020	us-gaap	Accretion Expense AccretionExpense	500000	USD
CY2019	us-gaap	Accretion Expense AccretionExpense	0	USD
CY2018	us-gaap	Accretion Expense AccretionExpense	0	USD
CY2020	us-gaap	Other Expenses OtherExpenses	13200000	USD
CY2019	us-gaap	Other Expenses OtherExpenses	10800000	USD
CY2018	us-gaap	Other Expenses OtherExpenses	8400000	USD
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	29600000	USD
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	23200000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	20100000	USD
CY2018	us-gaap	Provision For Other Losses ProvisionForOtherLosses	1000000.0	USD
CY2017	us-gaap	Provision For Other Losses ProvisionForOtherLosses	47000000.0	USD
CY2019	us-gaap	Payments For Legal Settlements PaymentsForLegalSettlements	8400000	USD
CY2019	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	2400000	USD
CY2019	us-gaap	Insurance Recoveries InsuranceRecoveries	10000000.0	USD
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	35600000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.245
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	8600000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.085
CY2018	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	11200000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.11
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	37100000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25900000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46000000.0	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-200000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	100000	USD
CY2020	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	37100000	USD
CY2019	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	25700000	USD
CY2018	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	46100000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	33000000.0	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	22200000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	23700000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4100000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3700000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	22300000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	37100000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25900000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46000000.0	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	206700000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	111000000.0	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	101500000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.015
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.245
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.010
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.008
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.001
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.007
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.008
CY2020	intl	Effective Income Tax Rate Reconciliation Permanent Items Percent EffectiveIncomeTaxRateReconciliationPermanentItemsPercent	0.009
CY2019	intl	Effective Income Tax Rate Reconciliation Permanent Items Percent EffectiveIncomeTaxRateReconciliationPermanentItemsPercent	0.001
CY2018	intl	Effective Income Tax Rate Reconciliation Permanent Items Percent EffectiveIncomeTaxRateReconciliationPermanentItemsPercent	-0.002
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.005
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.007
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.021
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.083
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.010
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CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
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CY2020	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0
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CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.007
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.022
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CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.004
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CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.180
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.233
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.453
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CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	3300000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	4100000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	3600000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	9900000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	4800000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	4400000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	1300000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	200000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	500000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	2400000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	5000000.0	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	5800000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	2200000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	7300000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	0	USD
CY2020Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1900000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1100000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	55300000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	34700000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	12400000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	8500000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	42900000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	26200000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	2400000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	3200000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	3400000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	2200000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	0	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2600000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	200000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	200000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6000000.0	USD
CY2019Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	8200000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	36900000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	18000000.0	USD
CY2020Q3	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	6900000	USD
CY2019Q3	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	7100000	USD
CY2020Q3	intl	Deferred Tax Assets Netof Valuation Allowance Operating Loss Carryforwards Stateand Local DeferredTaxAssetsNetofValuationAllowanceOperatingLossCarryforwardsStateandLocal	4700000	USD
CY2020Q3	intl	Federaloperatinglosscarryforwardsnetofvaluationallowances Federaloperatinglosscarryforwardsnetofvaluationallowances	600000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	5100000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	12400000	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	3900000	USD
CY2020	us-gaap	Foreign Earnings Repatriated ForeignEarningsRepatriated	30000000.0	USD
CY2019	us-gaap	Foreign Earnings Repatriated ForeignEarningsRepatriated	13000000.0	USD
CY2020	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-4700000	USD
CY2020	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4600000	USD
CY2020Q3	dei	Entity Number Of Employees EntityNumberOfEmployees	2900	employee
CY2020Q3	us-gaap	Number Of Countries In Which Entity Operates NumberOfCountriesInWhichEntityOperates	180	country
CY2020	us-gaap	Revenues Revenues	54139600000	USD
CY2019	us-gaap	Revenues Revenues	32897000000.0	USD
CY2018	us-gaap	Revenues Revenues	27622700000	USD
CY2020	us-gaap	Gross Profit GrossProfit	1308300000	USD
CY2019	us-gaap	Gross Profit GrossProfit	1106100000	USD
CY2018	us-gaap	Gross Profit GrossProfit	975800000	USD
CY2020	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	868000000.0	USD
CY2019	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	653200000	USD
CY2018	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	581600000	USD
CY2020	intl	Net Segment Contribution NetSegmentContribution	639500000	USD
CY2019	intl	Net Segment Contribution NetSegmentContribution	482800000	USD
CY2018	intl	Net Segment Contribution NetSegmentContribution	432400000	USD
CY2020	intl	Segment Income SegmentIncome	395100000	USD
CY2019	intl	Segment Income SegmentIncome	305700000	USD
CY2018	intl	Costsnotallocatedtooperatingsegments Costsnotallocatedtooperatingsegments	162400000	USD
CY2020	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	81900000	USD
CY2018	intl	Segment Income SegmentIncome	261900000	USD
CY2020	intl	Segment Income SegmentIncome	395100000	USD
CY2019	intl	Segment Income SegmentIncome	305700000	USD
CY2018	intl	Segment Income SegmentIncome	261900000	USD
CY2020	intl	Costsnotallocatedtooperatingsegments Costsnotallocatedtooperatingsegments	270300000	USD
CY2019	intl	Costsnotallocatedtooperatingsegments Costsnotallocatedtooperatingsegments	200200000	USD
CY2019	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	5500000	USD
CY2018	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	2000000.0	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	206700000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	111000000.0	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	101500000	USD
CY2019	us-gaap	Provision For Other Losses ProvisionForOtherLosses	-12400000	USD
CY2018	us-gaap	Provision For Other Losses ProvisionForOtherLosses	1000000.0	USD
CY2020Q3	us-gaap	Assets Assets	13474900000	USD
CY2019Q3	us-gaap	Assets Assets	9936100000	USD
CY2020	us-gaap	Revenues Revenues	54139600000	USD
CY2019	us-gaap	Revenues Revenues	32897000000.0	USD
CY2018	us-gaap	Revenues Revenues	27622700000	USD
CY2020	us-gaap	Gross Profit GrossProfit	1308300000	USD
CY2018Q3	us-gaap	Assets Assets	7824700000	USD
CY2019	us-gaap	Gross Profit GrossProfit	1106100000	USD
CY2018	us-gaap	Gross Profit GrossProfit	975800000	USD
CY2020Q3	us-gaap	Noncurrent Assets NoncurrentAssets	62100000	USD
CY2019Q3	us-gaap	Noncurrent Assets NoncurrentAssets	43900000	USD
CY2018Q3	us-gaap	Noncurrent Assets NoncurrentAssets	42400000	USD
CY2020Q3	us-gaap	Revenues Revenues	14284900000	USD
CY2020Q2	us-gaap	Revenues Revenues	8243400000	USD
CY2020Q1	us-gaap	Revenues Revenues	20366300000	USD
CY2019Q4	us-gaap	Revenues Revenues	11245000000.0	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	322600000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	366800000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	276800000	USD
CY2020Q3	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	13942800000	USD
CY2020Q2	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	7920800000	USD
CY2020Q1	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	19999500000	USD
CY2019Q4	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	10968200000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	342100000	USD
CY2020Q3	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	57100000	USD
CY2020Q2	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	55300000	USD
CY2020Q1	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	63800000	USD
CY2019Q4	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	46300000	USD
CY2020Q3	us-gaap	Noninterest Expense Commission Expense NoninterestExpenseCommissionExpense	34000000.0	USD
CY2020Q2	us-gaap	Noninterest Expense Commission Expense NoninterestExpenseCommissionExpense	24000000.0	USD
CY2020Q1	us-gaap	Noninterest Expense Commission Expense NoninterestExpenseCommissionExpense	29600000	USD
CY2019Q4	us-gaap	Noninterest Expense Commission Expense NoninterestExpenseCommissionExpense	26200000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	10000000.0	USD
CY2020Q2	us-gaap	Interest Expense InterestExpense	11500000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	27800000	USD
CY2019Q4	us-gaap	Interest Expense InterestExpense	31100000	USD
CY2020Q3	intl	Interest Expense On Corporate Funding InterestExpenseOnCorporateFunding	14800000	USD
CY2020Q2	intl	Interest Expense On Corporate Funding InterestExpenseOnCorporateFunding	3900000	USD
CY2020Q1	intl	Interest Expense On Corporate Funding InterestExpenseOnCorporateFunding	2200000	USD
CY2019Q4	intl	Interest Expense On Corporate Funding InterestExpenseOnCorporateFunding	2700000	USD
CY2020Q3	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	226200000	USD
CY2020Q2	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	227900000	USD
CY2020Q1	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	243400000	USD
CY2019Q4	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	170500000	USD
CY2020Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	145500000	USD
CY2020Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	132500000	USD
CY2020Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	136700000	USD
CY2019Q4	us-gaap	Labor And Related Expense LaborAndRelatedExpense	104000000.0	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	79900000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	49000000.0	USD
CY2020Q3	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	12500000	USD
CY2020Q2	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	1800000	USD
CY2020Q1	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	4400000	USD
CY2019Q4	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	0	USD
CY2020Q3	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	70100000	USD
CY2020Q2	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	44600000	USD
CY2020Q1	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	46200000	USD
CY2019Q4	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	44900000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	228100000	USD
CY2020Q2	us-gaap	Noninterest Expense NoninterestExpense	178900000	USD
CY2020Q1	us-gaap	Noninterest Expense NoninterestExpense	187300000	USD
CY2019Q4	us-gaap	Noninterest Expense NoninterestExpense	148900000	USD
CY2020Q3	intl	Gain Loss On Acquisitions And Other GainLossOnAcquisitionsAndOther	81800000	USD
CY2020Q2	intl	Gain Loss On Acquisitions And Other GainLossOnAcquisitionsAndOther	0	USD
CY2020Q1	intl	Gain Loss On Acquisitions And Other GainLossOnAcquisitionsAndOther	0	USD
CY2019Q4	intl	Gain Loss On Acquisitions And Other GainLossOnAcquisitionsAndOther	100000	USD
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CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	21700000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16800000	USD
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5400000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	77400000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2500000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12400000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	36600000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	39300000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	16300000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.00
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.90
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.03
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.90
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.87
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.00
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2019Q3	us-gaap	Revenues Revenues	11279600000	USD
CY2019Q2	us-gaap	Revenues Revenues	7873000000.0	USD
CY2019Q1	us-gaap	Revenues Revenues	7192200000	USD
CY2018Q4	us-gaap	Revenues Revenues	6552200000	USD
CY2019Q3	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	10992700000	USD
CY2019Q2	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	7589600000	USD
CY2019Q1	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	6921100000	USD
CY2018Q4	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	6287500000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	286900000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	283400000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	271100000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	264700000	USD
CY2019Q3	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	45000000.0	USD
CY2019Q2	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	45700000	USD
CY2019Q1	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	42700000	USD
CY2018Q4	us-gaap	Floor Brokerage Exchange And Clearance Fees FloorBrokerageExchangeAndClearanceFees	50100000	USD
CY2019Q3	us-gaap	Noninterest Expense Commission Expense NoninterestExpenseCommissionExpense	27700000	USD
CY2019Q2	us-gaap	Noninterest Expense Commission Expense NoninterestExpenseCommissionExpense	29600000	USD
CY2019Q1	us-gaap	Noninterest Expense Commission Expense NoninterestExpenseCommissionExpense	24800000	USD
CY2018Q4	us-gaap	Noninterest Expense Commission Expense NoninterestExpenseCommissionExpense	32600000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	37200000	USD
CY2019Q2	us-gaap	Interest Expense InterestExpense	39400000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	35200000	USD
CY2018Q4	us-gaap	Interest Expense InterestExpense	30200000	USD
CY2019Q3	intl	Interest Expense On Corporate Funding InterestExpenseOnCorporateFunding	3600000	USD
CY2019Q2	intl	Interest Expense On Corporate Funding InterestExpenseOnCorporateFunding	3100000	USD
CY2019Q1	intl	Interest Expense On Corporate Funding InterestExpenseOnCorporateFunding	3200000	USD
CY2018Q4	intl	Interest Expense On Corporate Funding InterestExpenseOnCorporateFunding	2800000	USD
CY2019Q3	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	173400000	USD
CY2019Q2	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	165600000	USD
CY2019Q1	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	165200000	USD
CY2018Q4	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	149000000.0	USD
CY2019Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	97900000	USD
CY2018Q4	us-gaap	Labor And Related Expense LaborAndRelatedExpense	89100000	USD
CY2019Q3	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	1000000.0	USD
CY2019Q2	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	500000	USD
CY2019Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	105200000	USD
CY2019Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	100900000	USD
CY2019Q1	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	700000	USD
CY2018Q4	intl	Accounts Receivable Credit Loss Expense Reversal And Impairment AccountsReceivableCreditLossExpenseReversalAndImpairment	300000	USD
CY2019Q3	us-gaap	Provision For Other Losses ProvisionForOtherLosses	-10000000.0	USD
CY2019Q2	us-gaap	Provision For Other Losses ProvisionForOtherLosses	0	USD
CY2019Q1	us-gaap	Provision For Other Losses ProvisionForOtherLosses	0	USD
CY2018Q4	us-gaap	Provision For Other Losses ProvisionForOtherLosses	-2400000	USD
CY2019Q3	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	43200000	USD
CY2019Q2	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	42600000	USD
CY2019Q1	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	41100000	USD
CY2018Q4	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	37600000	USD
CY2019Q3	us-gaap	Noninterest Expense NoninterestExpense	139400000	USD
CY2019Q2	us-gaap	Noninterest Expense NoninterestExpense	144000000.0	USD
CY2019Q1	us-gaap	Noninterest Expense NoninterestExpense	139700000	USD
CY2018Q4	us-gaap	Noninterest Expense NoninterestExpense	124600000	USD
CY2019Q3	intl	Gain Loss On Acquisitions And Other GainLossOnAcquisitionsAndOther	100000	USD
CY2019Q2	intl	Gain Loss On Acquisitions And Other GainLossOnAcquisitionsAndOther	0	USD
CY2019Q1	intl	Gain Loss On Acquisitions And Other GainLossOnAcquisitionsAndOther	5400000	USD
CY2018Q4	intl	Gain Loss On Acquisitions And Other GainLossOnAcquisitionsAndOther	0	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	34100000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	21600000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	30900000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	24400000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6900000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5300000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7500000	USD
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6200000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	27200000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	16300000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	23400000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	18200000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.42
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.23
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.96
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.40
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.21
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.94
CY2020Q3	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	81800000	USD
CY2019Q1	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	5400000	USD

Files In Submission

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0000913760-20-000206-index-headers.html	Edgar Link	pending
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$SNEX
StoneX Group Inc. Stock $snex

2020 Q3 Form 10-K Financial Statement

#000091376020000206 Filed on December 14, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SNEX StoneX Group Inc. Stock $snex

2020 Q3 Form 10-K Financial Statement

#000091376020000206 Filed on December 14, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SNEX
StoneX Group Inc. Stock $snex