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Securities and Commodity Financing Transactions - Gross Obligations Contractual Maturities (Tables) | 12 Months Ended
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Sep. 30, 2020
Brokers and Dealers [Abstract] |
Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets | The following tables provide the contractual maturities of gross obligations under repurchase and securities lending agreements as of the periods indicated (in millions):
| September 30, 2020
| Overnight and Open | Less than 30 Days | 30-90 Days | Over 90 Days | Total
Securities sold under agreements to repurchase | $ | 1,736.3 |  | $ | 1,069.2 |  | $ | 325.0 |  | 25.0 |  | $ | 3,155.5 |
Securities loaned | 1,441.9 |  | — |  | — |  | — |  | 1,441.9 |
Gross amount of secured financing | $ | 3,178.2 |  | $ | 1,069.2 |  | $ | 325.0 |  | $ | 25.0 |  | $ | 4,597.4 |
| September 30, 2019
| Overnight and Open | Less than 30 Days | 30-90 Days | Over 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 |
Schedule of Financial Instruments Owned and Pledged as Collateral | The following table provides the underlying collateral types of the gross obligations under repurchase and securities lending agreements as of the periods indicated (in millions):
Securities sold under agreements to repurchase | September 30, 2020 |  | September 30, 2019
U.S. Treasury obligations | $ | 815.8 |  |  | $ | 108.8 |
U.S. government agency obligations | 279.5 |  |  | 359.5 |
Asset-backed obligations | 18.0 |  |  | 96.7 |
Agency mortgage-backed obligations | 1,990.0 |  |  | 2,208.7 |
Corporate bonds | 52.2 |  |  | — |
Total securities sold under agreement to repurchase | $ | 3,155.5 |  |  | $ | 2,773.7 |
Securities loaned |  |  |
Equity securities | 1,441.9 |  |  | 1,459.9 |
Total securities loaned | 1,441.9 |  |  | 1,459.9 |
Gross amount of secured financing | $ | 4,597.4 |  |  | $ | 4,233.6 |
The following tables provide the netting of securities purchased under agreements to resell, securities sold under agreements to repurchase, securities borrowed and securities loaned as of the periods indicated (in millions):
| September 30, 2020
Offsetting of collateralized transactions: | Gross Amounts Recognized | Amounts Offset in the Consolidated Balance Sheet | Net Amounts Presented in the Consolidated Balance Sheet
Securities purchased under agreements to resell | $ | 1,696.2 |  | $ | — |  | $ | 1,696.2 |
Securities borrowed | $ | 1,440.0 |  | $ | — |  | $ | 1,440.0 |
Securities sold under agreements to repurchase | $ | 3,155.5 |  | $ | — |  | $ | 3,155.5 |
Securities loaned | $ | 1,441.9 |  | $ | — |  | $ | 1,441.9 |
| September 30, 2019
Offsetting of collateralized transactions: | Gross Amounts Recognized | Amounts Offset in the Consolidated Balance Sheet | Net Amounts Presented in the Consolidated Balance Sheet
Securities purchased under agreements to resell | $ | 1,474.4 |  | $ | (49.9) |  | $ | 1,424.5 |
Securities borrowed | $ | 1,423.2 |  | $ | — |  | $ | 1,423.2 |
Securities sold under agreements to repurchase | $ | 2,823.6 |  | $ | (49.9) |  | $ | 2,773.7 |
Securities loaned | $ | 1,459.9 |  | $ | — |  | $ | 1,459.9 |

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- Definition Tabular disclosure of financial instruments held by the entity for its own account for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions. Description may include equity, fixed income, debt or other securities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
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- Definition Tabular disclosure, as of the most recent balance sheet date, of securities or other assets sold under repurchase agreements when this amount exceeds 10 percent of total assets. Disclosure may include the following: the type of securities or assets sold under agreements to repurchase, the carrying amount, market value (including accrued interest plus any cash or other assets on deposit. The information is segregated into securities maturing (1) overnight; (2) term up to 30 days; (3) term of 30 to 90 days; (4) term over 90 days; (5) demand. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(A)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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