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Accumulated Other Comprehensive Loss - Amounts Reclassified Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Other (expense), net | $ 16.9 | $ 142.1
Total before tax | 20.0 | 132.3
Income tax | 10.6 | 17.0
Reclassification out of Accumulated Other Comprehensive Loss |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Total before tax | 20.9 | 147.3
Income tax | (1.4) | (0.8)
Total reclassifications for the period | 19.5 | 146.5
Reclassification out of Accumulated Other Comprehensive Loss | Adjustment for substantial completion of liquidation of foreign subsidiaries |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Other (expense), net | (1.1) | 0.5
Reclassification out of Accumulated Other Comprehensive Loss | Amortization of prior service benefit |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Other (expense), net | (0.9) | (1.0)
Reclassification out of Accumulated Other Comprehensive Loss | Amortization of actuarial losses |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Other (expense), net | 22.9 | 22.3
Reclassification out of Accumulated Other Comprehensive Loss | Settlement losses |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Other (expense), net | $ 0.0 | $ 125.5

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