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Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax | $ 1.0 | $ (80.8) | $ 38.2 | $ (99.5)
Tax | 0.4 | (0.5) | 0.2 | (0.7)
Other comprehensive income (loss) | 1.4 | (81.3) | 38.4 | (100.2)
Cumulative translation adjustment |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax | 2.3 | (81.9) | 38.9 | (101.4)
Tax | 0.0 | 0.0 | 0.0 | 0.0
Other comprehensive income (loss) | 2.3 | (81.9) | 38.9 | (101.4)
Pension and other postretirement adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax | (1.3) | 1.1 | (0.7) | 1.9
Tax | 0.4 | (0.5) | 0.2 | (0.7)
Other comprehensive income (loss) | $ (0.9) | $ 0.6 | $ (0.5) | $ 1.2

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