v3.25.4
Equity, Accumulated Other Comprehensive Income (Loss) (Details)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
contract
Dec. 31, 2025
USD ($)
contract
Dec. 31, 2024
USD ($)
contract
Dec. 31, 2023
USD ($)
Nov. 10, 2025
Equity            
Balance at beginning of period     $ 9,792.0      
Balance at end of period   $ 13,413.1 $ 13,413.1 $ 9,792.0    
Amounts reclassified from Accumulated Other Comprehensive Income (Loss), tax       $ (1.1)    
Cumulative after-tax loss $ 67.4 $ (67.4)        
4.625% Senior Notes Due February 2036            
Equity            
Stated interest rate (as a percent) 4.625% 4.625% 4.625%     4.625%
5.300% Senior Notes Due November 2055            
Equity            
Stated interest rate (as a percent) 5.30% 5.30% 5.30%     5.30%
Cash Flow Hedging            
Equity            
Number of foreign exchange forward contracts | contract   0 0 0    
Accumulated Other Comprehensive Loss            
Equity            
Balance at beginning of period     $ (716.3) $ (533.6) $ (535.0)  
Other comprehensive income (loss) before reclassification, net of tax     232.6 (186.2) (1.7)  
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax     4.2 3.5 3.1  
Balance at end of period   $ (479.5) (479.5) (716.3) (533.6)  
Foreign Currency Translation Adjustment            
Equity            
Balance at beginning of period     (612.0) (412.7) (413.0)  
Other comprehensive income (loss) before reclassification, net of tax     285.4 (199.3) 0.3  
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax     0.0 0.0 0.0  
Balance at end of period   (326.6) (326.6) (612.0) (412.7)  
Foreign currency translation adjustments, tax     0.0 0.0 0.0  
Unrealized Gain (Loss) on Hedging Activities            
Equity            
Balance at beginning of period     0.0 0.0 0.0  
Other comprehensive income (loss) before reclassification, net of tax     (67.4) 0.0 0.0  
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax     0.7 0.0 0.0  
Balance at end of period   (66.7) (66.7) 0.0 0.0  
Unrealized (gain) loss on hedging activities, tax     (20.6) 0.0 0.0  
Pension and Postretirement Benefit Plan Adjustment            
Equity            
Balance at beginning of period     (104.3) (120.9) (122.0)  
Other comprehensive income (loss) before reclassification, net of tax     14.6 13.1 (2.0)  
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax     3.5 3.5 3.1  
Balance at end of period   $ (86.2) (86.2) (104.3) (120.9)  
Pension and postretirement benefit plan adjustment, tax     (4.5) (5.2) 1.1  
Amounts reclassified from Accumulated Other Comprehensive Income (Loss), tax     $ 0.2 $ (1.1) (1.0)  
Cash Flow Hedges [Member]            
Equity            
Number of foreign exchange forward contracts | contract   0 0 0    
Net Investment Hedges [Member]            
Equity            
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax     $ 0.0 $ 0.0 $ 0.0  
Number of foreign exchange forward contracts | contract   0 0 0    
Aggregate value of net derivative instrument   $ 0.0 $ 0.0 $ 0.0    
Treasury Lock With 10 Year Term | Cash Flow Hedging            
Equity            
Aggregate value of net derivative instrument $ 1,500.0          
Derivative instruments period (in years) 10 years          
Treasury Lock With 30 Year Term | Cash Flow Hedging            
Equity            
Aggregate value of net derivative instrument $ 1,000.0          
Derivative instruments period (in years) 30 years