Commodity and Other Repurchase Agreements and Collateralized Transactions Schedule of Gross Collateralized Financings by Maturity (Tables)

3 Months Ended

Dec. 31, 2019

Assets Sold under Agreements to Repurchase [Line Items]

Schedule of Repurchase Agreement Counterparties with Whom Repurchase Agreements Exceed 10 Percent of Stockholders' Equity [Table Text Block]

	December 31, 2019
	Overnight and Open		Less than 30 Days		30-90 Days		Total
Securities sold under agreements to repurchase	$	1,339.9	$	826.3	$	765.4	$	2,931.6
Securities loaned	1,430.8		—		—		1,430.8
Gross amount of secured financing	$	2,770.7	$	826.3	$	765.4	$	4,362.4

	September 30, 2019
	Overnight and Open		Less than 30 Days		30-90 Days		Total
Securities sold under agreements to repurchase	$	1,553.9	$	565.8	$	654.0	$	2,773.7
Securities loaned	1,459.9		—		—		1,459.9
Gross amount of secured financing	$	3,013.8	$	565.8	$	654.0	$	4,233.6