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Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Statement of Comprehensive Income [Abstract] |  |  |  |
Unrealized appreciation on securities, income taxes | $ 0.0 | $ (5.6) | $ 0.0 | $ (2.0)
Minimum pension liability adjustments, income taxes | $ (0.2) | $ (0.2) | $ (0.1) | $ (0.3)

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