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Accumulated Other Comprehensive Income (Loss) (Notes) | 6 Months Ended
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Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Abstract] |
Comprehensive Income (Loss) Note [Text Block] | Accumulated Other Comprehensive Loss, Net Comprehensive income consists of net income and other gains and losses affecting stockholders’ equity that, under U.S. GAAP, are excluded from net income. Other comprehensive loss includes net actuarial losses from defined benefit pension plans and foreign currency translation adjustments. The following table summarizes the changes in accumulated other comprehensive loss, net for the six months ended March 31, 2019.
(in millions) |  | Foreign Currency Translation Adjustment |  | Pension Benefits Adjustment |  | Accumulated Other Comprehensive Loss
Balances as of September 30 2018 |  | $ | (30.5 | ) |  | $ | (2.6 | ) |  | $ | (33.1 | )
Other comprehensive income, net of tax |  | 0.3 |  |  | — |  |  | 0.3 |
Balances as of March 31, 2019 |  | $ | (30.2 | ) |  | $ | (2.6 | ) |  | $ | (32.8 | )

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- Definition Accumulated Other Comprehensive Income (Loss) [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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