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Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Statement of Comprehensive Income [Abstract] |  |  |
Net income | $ 85.1 | $ 55.5 | $ 6.4
Other comprehensive income (loss), net of tax [Abstract] |  |  |
Foreign currency translation adjustment | (0.8) | (9.0) | (1.4)
Pension liabilities adjustment | (0.8) | 0.3 | 1.2
Reclassification of adjustment for losses (gains) included in net income: |  |  |
Periodic pension costs (included in compensation and benefits) | 0.1 | 0.1 | 0.4
Foreign currency gains realized upon dissolution of subsidiaries (included in principal gains, net) | (0.2) | 0.0 | 0.0
Income tax expense from reclassification adjustments (included in income tax expense) | 0.0 | 0.0 | (0.1)
Reclassification adjustment for losses (gains) included in net income | (0.1) | 0.1 | 0.3
Other comprehensive income (loss) | (1.7) | (8.6) | 0.1
Comprehensive income | $ 83.4 | $ 46.9 | $ 6.5

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