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Accumulated Other Comprehensive (Loss) Income - Accumulated Other Comprehensive (Loss) Income Rollforward (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Accumulated Other Comprehensive Loss    
Beginning balance $ 2,939.0 $ 2,684.3
Other comprehensive loss before reclassifications, net of taxes (55.6) 4.0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes (0.1) 0.1
Net current-period other comprehensive loss, net of taxes (55.7) 4.1
Ending balance 2,894.3 2,706.9
Accumulated other comprehensive income (loss)    
Accumulated Other Comprehensive Loss    
Beginning balance 10.8 (58.0)
Ending balance (44.9) (53.9)
Foreign currency translation adjustments    
Accumulated Other Comprehensive Loss    
Beginning balance 13.2 (50.5)
Other comprehensive loss before reclassifications, net of taxes (55.6) 4.0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes 0.0 0.0
Net current-period other comprehensive loss, net of taxes (55.6) 4.0
Ending balance (42.4) (46.5)
Pension liability adjustments, net of taxes    
Accumulated Other Comprehensive Loss    
Beginning balance (2.4) (7.5)
Other comprehensive loss before reclassifications, net of taxes 0.0 0.0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes (0.1) 0.1
Net current-period other comprehensive loss, net of taxes (0.1) 0.1
Ending balance $ (2.5) $ (7.4)