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Derivative Financial Instruments (Tables) | 12 Months Ended
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Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] | The fair values of the swap contracts are presented below.
| September 30,
| 2018 |  | 2017
| (in millions)
Interest rate swap contracts, designated as cash flow hedges: |  |  |
Other current liabilities | $ | — |  |  | $ | 1.2 |
Other noncurrent liabilities | — |  |  | 1.3 |
| $ | — |  |  | $ | 2.5 |
Currency swap contracts, not designated as hedges: |  |  |
Other noncurrent liabilities | $ | 0.9 |  |  | $ | 1.3 |

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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging 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 4B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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