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Other Comprehensive Income (Loss) - Schedule of Changes in Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax | $ (12.6) | $ 1.8 | $ (13.9) | $ (7.7)
Tax | 0.3 | 6.6 | 1.0 | 5.3
Other comprehensive income (loss) | (12.3) | 8.4 | (12.9) | (2.4)
Pension and OPEB liability adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax | (8.3) | (0.1) | (8.3) | 0.3
Tax | 0.0 | 0.3 | 0.1 | 0.2
Other comprehensive income (loss) | (8.3) | 0.2 | (8.2) | 0.5
Derivative instrument adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax | (3.3) | (17.0) | (15.1) | (15.7)
Tax | 0.0 | 3.5 | 0.0 | 1.9
Other comprehensive income (loss) | (3.3) | (13.5) | (15.1) | (13.8)
Unrealized foreign currency translation adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax | (1.0) | 18.9 | 9.5 | 7.7
Tax | 0.3 | 2.8 | 0.9 | 3.2
Other comprehensive income (loss) | $ (0.7) | $ 21.7 | $ 10.4 | $ 10.9

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