v3.25.2
Accumulated Other Comprehensive Loss - Summary (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance $ (254.1) $ (144.8) $ (269.3) $ (138.4)
Total other comprehensive income (loss) 64.7 (7.8) 107.0 130.7
Ending balance (206.9) (160.6) (206.9) (160.6)
Total        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (2,715.6) (2,662.0) (2,757.2) (2,800.3)
Other comprehensive income (loss) before reclassifications     65.9  
Amounts reclassified from accumulated other comprehensive loss     39.6  
Total other comprehensive income (loss)     105.5  
Ending balance (2,651.7) $ (2,670.0) (2,651.7) $ (2,670.0)
Translation Adjustments        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance     (984.7)  
Other comprehensive income (loss) before reclassifications     133.7  
Amounts reclassified from accumulated other comprehensive loss     (2.7)  
Total other comprehensive income (loss)     131.0  
Ending balance (853.7)   (853.7)  
Postretirement Plans        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance     (1,772.5)  
Other comprehensive income (loss) before reclassifications     (67.8)  
Amounts reclassified from accumulated other comprehensive loss     42.3  
Total other comprehensive income (loss)     (25.5)  
Ending balance $ (1,798.0)   $ (1,798.0)