v3.26.3
Shareholders' Equity - Schedule of Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Beginning balance $ 2,960.0 $ 2,880.2 $ 2,785.4 $ 2,890.4
Other comprehensive income before reclassifications, net of tax     41.2  
Reclassifications from accumulated other comprehensive income/loss, net of tax     (1.8)  
Other comprehensive income 1.8 11.7 39.4 19.1
Ending balance 3,066.8 2,718.5 3,066.8 2,718.5
Accumulated Other Comprehensive Income/Loss        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Beginning balance 30.2 (35.2) (7.4) (42.5)
Other comprehensive income 1.8 11.7 39.4 19.1
Ending balance 32.0 $ (23.5) 32.0 $ (23.5)
Cash Flow Hedges        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Beginning balance     0.5  
Other comprehensive income before reclassifications, net of tax     16.3  
Reclassifications from accumulated other comprehensive income/loss, net of tax     (1.9)  
Other comprehensive income     14.4  
Ending balance 14.9   14.9  
Defined Benefit and Retiree Healthcare Plans        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Beginning balance     (10.3)  
Other comprehensive income before reclassifications, net of tax     0.0  
Reclassifications from accumulated other comprehensive income/loss, net of tax     (0.0)  
Other comprehensive income     0.0  
Ending balance (10.2)   (10.2)  
Cumulative Translation Adjustment        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Beginning balance     2.3  
Other comprehensive income before reclassifications, net of tax     25.0  
Reclassifications from accumulated other comprehensive income/loss, net of tax     0.0  
Other comprehensive income     25.0  
Ending balance $ 27.3   $ 27.3