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Fair Value Measurements - Fair Value, Assets and Liabilities Measured on a Recurring Basis (Details) - Recurring - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]    
Equity securities $ 122.9 $ 130.9
Redeemable noncontrolling interests 56.1 56.5
Other Current Assets    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]    
Equity securities 44.6 39.0
Other Noncurrent Assets    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]    
Equity securities 78.3 91.9
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]    
Equity securities 4.3 4.2
Redeemable noncontrolling interests 0.0 0.0
Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]    
Equity securities 118.6 126.7
Redeemable noncontrolling interests 0.0 0.0
Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]    
Equity securities 0.0 0.0
Redeemable noncontrolling interests $ 56.1 $ 56.5