v3.26.1
Accumulated Other Comprehensive Income (Loss) - Change in AOCI Balances (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning Balance $ 4,464.0 $ 1,544.0
Other comprehensive income before reclassification (14.0) 139.0
Amounts reclassified from accumulated other comprehensive income (5.0) 107.0
Ending balance 4,483.0 4,107.0
Accumulated Other Comprehensive Income (Loss)    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning Balance 281.0 (224.0)
Ending balance 262.0 22.0
Pension and Other Postretirement Benefits    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning Balance (7.0) (113.0)
Other comprehensive income before reclassification 0.0 2.0
Amounts reclassified from accumulated other comprehensive income 0.0 110.0
Ending balance (7.0) (1.0)
Derivatives Designated as Hedges    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning Balance (18.0) 2.0
Other comprehensive income before reclassification (1.0) (17.0)
Amounts reclassified from accumulated other comprehensive income (1.0) (3.0)
Ending balance (20.0) (18.0)
Foreign Currency Translation    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning Balance 306.0 (113.0)
Other comprehensive income before reclassification (13.0) 154.0
Amounts reclassified from accumulated other comprehensive income (4.0) 0.0
Ending balance $ 289.0 $ 41.0