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Derivative Financial Instruments Schedule of Interest Rate Swaps (Tables) | 9 Months Ended
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Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] | The following amounts were recorded on the condensed consolidated balance sheets related to fixed-to-floating interest rate swaps designated in fair value hedging relationships:
| Carrying amount of hedged assets (liabilities) |  | Cumulative amount of fair value hedging adjustment included in the carrying amount
| Jun 30, 2019 |  | Sep 30, 2018 |  | Jun 30, 2019 |  | Sep 30, 2018
Location on the balance sheet |  |  |  |  |  |  |
Long-term debt | $ | 755.8 |  |  | $ | 711.0 |  |  | $ | 5.8 |  |  | $ | (39.0 | )

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- Definition Tabular disclosure for fair value hedging instruments of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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