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FAIR VALUE MEASUREMENTS - Schedule of Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Assets    
Available-for-sale investments: $ 824.0 $ 1,021.3
Bank time deposits    
Assets    
Available-for-sale investments: 10.1 13.9
Corporate debt securities    
Assets    
Available-for-sale investments: 230.9 462.3
Asset-backed securities    
Assets    
Available-for-sale investments: 58.1 68.8
United States government and agency securities    
Assets    
Available-for-sale investments: 266.5 237.1
Commercial paper    
Assets    
Available-for-sale investments: 255.6 236.5
Municipal securities    
Assets    
Available-for-sale investments: 2.8 2.7
Fair Value on a Recurring Basis | Estimate of Fair Value Measurement    
Assets    
Cash equivalents 2,677.2 2,379.9
Investments held for deferred compensation plans 140.1 146.6
Derivatives 39.8 82.1
Assets 3,686.7 3,635.4
Liabilities    
Derivatives 10.5 8.2
Contingent consideration liabilities 16.5 16.5
Other 6.1 5.0
Liabilities 33.1 29.7
Fair Value on a Recurring Basis | Bank time deposits | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 10.1 13.9
Fair Value on a Recurring Basis | Corporate debt securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 230.9 462.3
Fair Value on a Recurring Basis | Asset-backed securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 58.1 68.8
Fair Value on a Recurring Basis | United States government and agency securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 266.5 237.1
Fair Value on a Recurring Basis | Commercial paper | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 255.6 236.5
Fair Value on a Recurring Basis | Municipal securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 2.8 2.7
Fair Value on a Recurring Basis | Equity investments in unconsolidated entities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 5.6 5.5
Fair Value on a Recurring Basis | Level 1 | Estimate of Fair Value Measurement    
Assets    
Cash equivalents 1,486.4 1,394.4
Investments held for deferred compensation plans 140.1 146.6
Derivatives 0.0 0.0
Assets 1,632.1 1,546.5
Liabilities    
Derivatives 0.0 0.0
Contingent consideration liabilities 0.0 0.0
Other 0.0 0.0
Liabilities 0.0 0.0
Fair Value on a Recurring Basis | Level 1 | Bank time deposits | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 1 | Corporate debt securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 1 | Asset-backed securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 1 | United States government and agency securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 1 | Commercial paper | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 1 | Municipal securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 1 | Equity investments in unconsolidated entities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 5.6 5.5
Fair Value on a Recurring Basis | Level 2 | Estimate of Fair Value Measurement    
Assets    
Cash equivalents 1,190.8 985.5
Investments held for deferred compensation plans 0.0 0.0
Derivatives 39.8 82.1
Assets 2,054.6 2,088.9
Liabilities    
Derivatives 10.5 8.2
Contingent consideration liabilities 0.0 0.0
Other 0.0 0.0
Liabilities 10.5 8.2
Fair Value on a Recurring Basis | Level 2 | Bank time deposits | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 10.1 13.9
Fair Value on a Recurring Basis | Level 2 | Corporate debt securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 230.9 462.3
Fair Value on a Recurring Basis | Level 2 | Asset-backed securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 58.1 68.8
Fair Value on a Recurring Basis | Level 2 | United States government and agency securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 266.5 237.1
Fair Value on a Recurring Basis | Level 2 | Commercial paper | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 255.6 236.5
Fair Value on a Recurring Basis | Level 2 | Municipal securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 2.8 2.7
Fair Value on a Recurring Basis | Level 2 | Equity investments in unconsolidated entities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 3 | Estimate of Fair Value Measurement    
Assets    
Cash equivalents 0.0 0.0
Investments held for deferred compensation plans 0.0 0.0
Derivatives 0.0 0.0
Assets 0.0 0.0
Liabilities    
Derivatives 0.0 0.0
Contingent consideration liabilities 16.5 16.5
Other 6.1 5.0
Liabilities 22.6 21.5
Fair Value on a Recurring Basis | Level 3 | Bank time deposits | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 3 | Corporate debt securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 3 | Asset-backed securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 3 | United States government and agency securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 3 | Commercial paper | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 3 | Municipal securities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: 0.0 0.0
Fair Value on a Recurring Basis | Level 3 | Equity investments in unconsolidated entities | Estimate of Fair Value Measurement    
Assets    
Available-for-sale investments: $ 0.0 $ 0.0