v3.25.2
Accumulated Other Comprehensive Loss - Schedule 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
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning of period   $ 3,410.6     $ 3,410.6  
Current period other comprehensive income (loss) $ 32.3   $ (17.3)   51.8 $ (26.6)
End of period 3,498.8       3,498.8  
Cash flow hedge gain (loss)            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning of period   1.0     1.0  
Other comprehensive income (loss) before reclassifications         (1.0)  
Amounts reclassified from accumulated other comprehensive income (loss)         (0.5)  
Current period other comprehensive income (loss)         (1.5)  
End of period (0.5)       (0.5)  
Unrealized gain (loss) on available-for- sale securities            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning of period   (0.3)     (0.3)  
Other comprehensive income (loss) before reclassifications         0.5  
Amounts reclassified from accumulated other comprehensive income (loss)         0.0  
Current period other comprehensive income (loss)         0.5  
End of period 0.2       0.2  
Pension and post retirement benefit plan adjustment            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning of period   (193.4)     (193.4)  
Other comprehensive income (loss) before reclassifications         0.0  
Amounts reclassified from accumulated other comprehensive income (loss)         4.5  
Current period other comprehensive income (loss)         4.5  
End of period (188.9)       (188.9)  
Cumulative translation adjustment            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning of period   (193.8)     (193.8)  
Other comprehensive income (loss) before reclassifications         48.3  
Amounts reclassified from accumulated other comprehensive income (loss)         0.0  
Current period other comprehensive income (loss)         48.3  
End of period (145.5)       (145.5)  
Total            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning of period (367.0) (386.5) (321.7) $ (312.4) (386.5) (312.4)
Other comprehensive income (loss) before reclassifications         47.8  
Amounts reclassified from accumulated other comprehensive income (loss)         4.0  
Current period other comprehensive income (loss) 32.3 19.5 (17.3) (9.3) 51.8  
End of period $ (334.7) $ (367.0) $ (339.0) $ (321.7) $ (334.7) $ (339.0)