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Accumulated Other Comprehensive Income (Loss) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive loss $ (2,334.5)   $ (2,449.0)  
Other Comprehensive Income (Loss), Tax 119.6 $ (137.5)    
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax (3.5) (1.7)    
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax 7.9 (10.3)    
Other comprehensive income (loss) 116.1 (139.2)    
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest (1.6) 0.8    
Stockholders' Equity Attributable to Parent 11,770.9   11,482.4  
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax 109.1 (125.5)    
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax (1.0) (4.2)    
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax 108.1 (129.7)    
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest (1.6) 0.8    
Stockholders' Equity Attributable to Parent (2,313.8) (2,059.1) (2,420.3) $ (1,930.2)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax 0.2 1.3    
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax (0.1) (0.5)    
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax 0.1 0.8    
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest 0.0 0.0    
Stockholders' Equity Attributable to Parent (22.0) (32.2) (22.1) (33.0)
AOCI, Derivative Qualifying as Hedge, Excluded Component, Noncontrolling Interest [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax 0.0 0.0    
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax 0.0 0.0    
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax 0.0 0.0    
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest 0.0 0.0    
Stockholders' Equity Attributable to Parent 8.0 8.1 8.0 8.1
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net (loss) gain on marketable securities held in trust fund, net of tax (2.4) 3.0    
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax 7.9 (10.3)    
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax 10.3 (13.3)    
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest 0.0 0.0    
Stockholders' Equity Attributable to Parent (6.7) (10.1) (14.6) 0.2
Accumulated Other Comprehensive Loss        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Stockholders' Equity Attributable to Parent $ (2,334.5) $ (2,093.3) $ (2,449.0) $ (1,954.9)