v3.25.4
Fair Value Measurements (Details)
$ in Millions
1 Months Ended 3 Months Ended
Aug. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
contract
Dec. 31, 2024
USD ($)
contract
Fair value of assets and liabilities measured on recurring basis      
Cumulative loss before tax   $ (88.0)  
Cumulative after-tax loss $ 67.4 $ (67.4)  
Net Investment Hedging [Member]      
Fair value of assets and liabilities measured on recurring basis      
Number of foreign exchange forward contracts | contract   0 0
Cash Flow Hedging [Member]      
Fair value of assets and liabilities measured on recurring basis      
Number of foreign exchange forward contracts | contract   0 0
Treasury Lock With 10 Year Term | Cash Flow Hedging [Member]      
Fair value of assets and liabilities measured on recurring basis      
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 [Member]      
Fair value of assets and liabilities measured on recurring basis      
Aggregate value of net derivative instrument $ 1,000.0    
Derivative instruments period (in years) 30 years    
4.625% Senior Notes Due February 2036      
Fair value of assets and liabilities measured on recurring basis      
Stated interest rate (as a percent)   4.625%  
5.300% Senior Notes Due November 2055      
Fair value of assets and liabilities measured on recurring basis      
Stated interest rate (as a percent)   5.30%  
Fair Value, Recurring [Member]      
Fair value of assets and liabilities measured on recurring basis      
Short-term investments   $ 303.6 $ 18.4
Long-term investments   0.2 0.3
Forward contracts   0.3 (1.1)
Redeemable noncontrolling interests   (9.3) (8.7)
Total asset   294.8 8.9
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair value of assets and liabilities measured on recurring basis      
Short-term investments   0.0 0.0
Long-term investments   0.0 0.0
Forward contracts   0.0 0.0
Redeemable noncontrolling interests   0.0 0.0
Total asset   0.0 0.0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair value of assets and liabilities measured on recurring basis      
Short-term investments   303.6 18.4
Long-term investments   0.2 0.3
Forward contracts   0.3 (1.1)
Redeemable noncontrolling interests   0.0 0.0
Total asset   304.1 17.6
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair value of assets and liabilities measured on recurring basis      
Short-term investments   0.0 0.0
Long-term investments   0.0 0.0
Forward contracts   0.0 0.0
Redeemable noncontrolling interests   (9.3) (8.7)
Total liability   $ (9.3) $ (8.7)