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Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance $ 2,682.3 $ 2,881.0 $ 2,684.9
Other comprehensive income (loss) before reclassifications 152.4 (116.6) 34.1
Amounts reclassified out 0.2 2.3 5.1
Other comprehensive income (loss), net of tax 152.6 (114.3) 39.2
Ending balance 3,176.0 2,682.3 2,881.0
Total      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (258.1) (143.8) (183.0)
Other comprehensive income (loss), net of tax 152.6 (114.3) 39.2
Ending balance (105.5) (258.1) (143.8)
Derivatives      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (2.5) 0.0 0.2
Other comprehensive income (loss) before reclassifications 0.4 (5.6) (6.8)
Amounts reclassified out 0.6 3.1 6.6
Other comprehensive income (loss), net of tax 1.0 (2.5) (0.2)
Ending balance (1.5) (2.5) 0.0
Equity affiliate investment AOCI      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance 2.5 2.3 1.6
Other comprehensive income (loss) before reclassifications 0.7 0.2 0.7
Amounts reclassified out 0.0 0.0 0.0
Other comprehensive income (loss), net of tax 0.7 0.2 0.7
Ending balance 3.2 2.5 2.3
Defined benefit pension and other postretirement plans      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (9.8) (10.1) (9.4)
Other comprehensive income (loss) before reclassifications 2.1 1.1 0.8
Amounts reclassified out (0.4) (0.8) (1.5)
Other comprehensive income (loss), net of tax 1.7 0.3 (0.7)
Ending balance (8.1) (9.8) (10.1)
Foreign currency translation      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (248.3) (136.0) (175.4)
Other comprehensive income (loss) before reclassifications 149.2 (112.3) 39.4
Amounts reclassified out 0.0 0.0 0.0
Other comprehensive income (loss), net of tax 149.2 (112.3) 39.4
Ending balance $ (99.1) $ (248.3) $ (136.0)