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Commodity and Other Repurchase Agreements (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Sep. 30, 2016
--- | --- | ---
Securities sold under agreements to repurchase | $ 1,393.1 | $ 1,167.1
Fair Value of Securities Received as Collateral that Can be Resold or Repledged | 631.7 |
Fair Value of Securities Received as Collateral that Have Been Resold or Repledged | 306.9 |
Financial Instruments Owned and Pledged as Collateral, Amount Eligible to be Repledged by Counterparty | 19.4 |
Securities Loaned, Fair Value of Collateral | 108.4 |
Financial Instruments Owned and Pledged as Collateral, Amount Not Eligible to be Repledged by Counterparty | 1,406.6 |
Securities Loaned | 111.1 | 0.0
Collateralized Financings | 1,504.2 |
Sales Repurchase Agreements | 0.8 | 1.5
Securities Sold under Agreements to Repurchase, Fair Value of Collateral | 19.4 | $ 47.2
Maturity Overnight [Member] |  |
Securities sold under agreements to repurchase | 640.2 |
Securities Loaned | 111.1 |
Collateralized Financings | 751.3 |
Maturity Less than 30 Days [Member] |  |
Securities sold under agreements to repurchase | 432.9 |
Securities Loaned | 0.0 |
Collateralized Financings | 432.9 |
Maturity 30 to 90 Days [Member] |  |
Securities sold under agreements to repurchase | 320.0 |
Securities Loaned | 0.0 |
Collateralized Financings | 320.0 |
Maturity Greater than 90 Days [Member] |  |
Securities sold under agreements to repurchase | 0.0 |
Securities Loaned | 0.0 |
Collateralized Financings | 0.0 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Securities sold under agreements to repurchase | 1,017.1 |
Asset-backed Securities [Member] |  |
Securities sold under agreements to repurchase | 36.4 |
US Government Debt Securities [Member] |  |
Securities sold under agreements to repurchase | 7.0 |
US Government Agencies Debt Securities [Member] |  |
Securities sold under agreements to repurchase | 332.6 |
Equity Securities [Member] |  |
Securities Loaned | $ 111.1 |

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- Definition The value of the collateral (typically cash) that the entity receives in a financing transaction in exchange for securities lent. This item represents a liability in the financial statements of the lender of the securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(A)(ii)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 25 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64840732&loc=d3e113275-111724 + Details
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- Definition Fair value of collateral permitted, by contact or custom, to be sold or re-pledged. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=64858031&loc=SL6224234-111729 + Details
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- Definition Fair value of the collateral, or portion thereof, that has been re-pledged, delivered, or otherwise used. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=64858031&loc=SL6224234-111729 + Details
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- Definition Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions where counterparty has the right to re-pledge such. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition Amount, after the effects of master netting arrangements, of securities loaned to entities in exchange for collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 405 -Section 55 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35710563&loc=d3e44140-110984 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226008-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64858031&loc=SL6224234-111729 + Details
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- Definition Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(a)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(1)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226008-175313 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49176635&loc=d3e9760-107771 + Details
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