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FAIR VALUE MEASUREMENTS - Schedule of Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Assets    
Available-for-sale investments: $ 894.2 $ 898.7
Equity investments in unconsolidated entities 7.4 0.0
Bank time deposits    
Assets    
Available-for-sale investments: 17.6 0.0
Corporate debt securities    
Assets    
Available-for-sale investments: 498.3 641.8
Asset-backed securities    
Assets    
Available-for-sale investments: 78.6 184.3
United States government and agency securities    
Assets    
Available-for-sale investments: 184.1 70.0
Commercial paper    
Assets    
Available-for-sale investments: 112.9 0.0
Municipal securities    
Assets    
Available-for-sale investments: 2.7 2.6
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis    
Assets    
Cash equivalents 3,140.1 579.2
Equity investments in unconsolidated entities 7.5  
Investments held for deferred compensation plans 143.9 125.8
Derivatives 27.6 39.5
Assets 4,213.3 1,643.2
Liabilities    
Derivatives 24.3 15.2
Contingent consideration liabilities 3.8  
Other 5.0 10.3
Liabilities 33.1 25.5
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Bank time deposits    
Assets    
Available-for-sale investments: 17.6  
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Corporate debt securities    
Assets    
Available-for-sale investments: 498.3 641.8
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Asset-backed securities    
Assets    
Available-for-sale investments: 78.6 184.3
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | United States government and agency securities    
Assets    
Available-for-sale investments: 184.1 70.0
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Commercial paper    
Assets    
Available-for-sale investments: 112.9  
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Municipal securities    
Assets    
Available-for-sale investments: 2.7 2.6
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 1    
Assets    
Cash equivalents 2,287.8 579.2
Equity investments in unconsolidated entities 7.5  
Investments held for deferred compensation plans 143.9 125.8
Derivatives 0.0 0.0
Assets 2,488.5 705.0
Liabilities    
Derivatives 0.0 0.0
Contingent consideration liabilities 0.0  
Other 0.0 0.0
Liabilities 0.0 0.0
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 1 | Bank time deposits    
Assets    
Available-for-sale investments: 0.0  
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 1 | Corporate debt securities    
Assets    
Available-for-sale investments: 0.0 0.0
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 1 | Asset-backed securities    
Assets    
Available-for-sale investments: 0.0 0.0
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 1 | United States government and agency securities    
Assets    
Available-for-sale investments: 49.3 0.0
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 1 | Commercial paper    
Assets    
Available-for-sale investments: 0.0  
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 1 | Municipal securities    
Assets    
Available-for-sale investments: 0.0 0.0
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2    
Assets    
Cash equivalents 852.3 0.0
Equity investments in unconsolidated entities 0.0  
Investments held for deferred compensation plans 0.0 0.0
Derivatives 27.6 39.5
Assets 1,724.8 938.2
Liabilities    
Derivatives 24.3 15.2
Contingent consideration liabilities 0.0  
Other 0.0 0.0
Liabilities 24.3 15.2
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | Bank time deposits    
Assets    
Available-for-sale investments: 17.6  
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | Corporate debt securities    
Assets    
Available-for-sale investments: 498.3 641.8
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | Asset-backed securities    
Assets    
Available-for-sale investments: 78.6 184.3
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | United States government and agency securities    
Assets    
Available-for-sale investments: 134.8 70.0
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | Commercial paper    
Assets    
Available-for-sale investments: 112.9  
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | Municipal securities    
Assets    
Available-for-sale investments: 2.7 2.6
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 3    
Assets    
Cash equivalents 0.0 0.0
Equity investments in unconsolidated entities 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 3.8  
Other 5.0 10.3
Liabilities 8.8 10.3
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 3 | Bank time deposits    
Assets    
Available-for-sale investments: 0.0  
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 3 | Corporate debt securities    
Assets    
Available-for-sale investments: 0.0 0.0
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 3 | Asset-backed securities    
Assets    
Available-for-sale investments: 0.0 0.0
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 3 | United States government and agency securities    
Assets    
Available-for-sale investments: 0.0 0.0
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 3 | Commercial paper    
Assets    
Available-for-sale investments: 0.0  
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 3 | Municipal securities    
Assets    
Available-for-sale investments: $ 0.0 $ 0.0