Commodity and Other Repurchase Agreements and Collateralized Transactions Schedule of Collateralized Financings by Collateral Type (Tables)

6 Months Ended

Mar. 31, 2019

Financial Instruments Owned and Pledged as Collateral [Line Items]

Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]

Securities sold under agreements to repurchase	March 31, 2019		September 30, 2018
U.S. Treasury obligations	$	122.6	$	39.6
U.S. government agency obligations	372.8		461.7
Asset-backed obligations	86.5		50.0
Agency mortgage-backed obligations	1,802.8		1,385.4
Total securities sold under agreement to repurchase	2,384.7		1,936.7
Securities loaned
Equity securities	1,376.5		277.9
Total securities loaned	1,376.5		277.9
Gross amount of secured financing	$	3,761.2	$	2,214.6