v3.25.2
Accumulated Other Comprehensive Loss - Amounts Reclassified Out of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Other (expense), net $ 22.1   $ 9.4   $ 39.0 $ 151.5
Total before tax 0.0   (6.3)   20.0 126.0
Income tax 20.0   18.8   30.6 35.8
Total reclassifications for the period 20.0 $ 30.6 12.5 $ 149.3 50.6 161.8
Reclassification out of Accumulated Other Comprehensive Loss            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Total before tax 20.7   19.4   41.6 166.7
Income tax (0.6)   (0.8)   (2.0) (1.6)
Total reclassifications for the period 20.1   18.6   39.6 165.1
Reclassification out of Accumulated Other Comprehensive Loss | Adjustment for substantial completion of liquidation of certain foreign subsidiaries            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Other (expense), net (1.6)   1.2   (2.7) 1.7
Reclassification out of Accumulated Other Comprehensive Loss | Amortization of prior service benefit            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Other (expense), net (0.9)   (0.9)   (1.8) (1.9)
Reclassification out of Accumulated Other Comprehensive Loss | Amortization of actuarial losses            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Other (expense), net 23.2   19.1   46.1 41.4
Reclassification out of Accumulated Other Comprehensive Loss | Settlement losses            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Other (expense), net $ 0.0   $ 0.0   $ 0.0 $ 125.5