FAIR VALUE MEASUREMENTS - Schedule of Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Assets
Available-for-sale investments:	$ 1,176.4	$ 1,021.3
Bank time deposits
Assets
Available-for-sale investments:	0.0	13.9
Corporate debt securities
Assets
Available-for-sale investments:	188.1	462.3
Asset-backed securities
Assets
Available-for-sale investments:	44.2	68.8
U.S. government and agency securities
Assets
Available-for-sale investments:	380.3	237.1
Commercial paper
Assets
Available-for-sale investments:	563.8	236.5
Municipal securities
Assets
Available-for-sale investments:	0.0	2.7
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis
Assets
Cash equivalents	2,204.9	2,379.9
Investments held for deferred compensation plans	162.1	146.6
Derivatives	15.2	82.1
Assets	3,564.7	3,635.4
Liabilities
Derivatives	35.7	8.2
Contingent consideration liabilities	2.0	16.5
Other	6.1	5.0
Liabilities	43.8	29.7
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Bank time deposits
Assets
Available-for-sale investments:		13.9
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Corporate debt securities
Assets
Available-for-sale investments:	188.1	462.3
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Asset-backed securities
Assets
Available-for-sale investments:	44.2	68.8
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | U.S. government and agency securities
Assets
Available-for-sale investments:	380.3	237.1
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Commercial paper
Assets
Available-for-sale investments:	563.8	236.5
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Municipal securities
Assets
Available-for-sale investments:		2.7
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Equity investments in unconsolidated entities
Assets
Available-for-sale investments:	6.1	5.5
Level 1 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis
Assets
Cash equivalents	840.0	1,394.4
Investments held for deferred compensation plans	162.1	146.6
Derivatives	0.0	0.0
Assets	1,008.2	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
Level 1 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Bank time deposits
Assets
Available-for-sale investments:		0.0
Level 1 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Corporate debt securities
Assets
Available-for-sale investments:	0.0	0.0
Level 1 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Asset-backed securities
Assets
Available-for-sale investments:	0.0	0.0
Level 1 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | U.S. government and agency securities
Assets
Available-for-sale investments:	0.0	0.0
Level 1 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Commercial paper
Assets
Available-for-sale investments:	0.0	0.0
Level 1 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Municipal securities
Assets
Available-for-sale investments:		0.0
Level 1 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Equity investments in unconsolidated entities
Assets
Available-for-sale investments:	6.1	5.5
Level 2 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis
Assets
Cash equivalents	1,364.9	985.5
Investments held for deferred compensation plans	0.0	0.0
Derivatives	15.2	82.1
Assets	2,556.5	2,088.9
Liabilities
Derivatives	35.7	8.2
Contingent consideration liabilities	0.0	0.0
Other	0.0	0.0
Liabilities	35.7	8.2
Level 2 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Bank time deposits
Assets
Available-for-sale investments:		13.9
Level 2 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Corporate debt securities
Assets
Available-for-sale investments:	188.1	462.3
Level 2 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Asset-backed securities
Assets
Available-for-sale investments:	44.2	68.8
Level 2 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | U.S. government and agency securities
Assets
Available-for-sale investments:	380.3	237.1
Level 2 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Commercial paper
Assets
Available-for-sale investments:	563.8	236.5
Level 2 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Municipal securities
Assets
Available-for-sale investments:		2.7
Level 2 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Equity investments in unconsolidated entities
Assets
Available-for-sale investments:	0.0	0.0
Level 3 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis
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	2.0	16.5
Other	6.1	5.0
Liabilities	8.1	21.5
Level 3 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Bank time deposits
Assets
Available-for-sale investments:		0.0
Level 3 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Corporate debt securities
Assets
Available-for-sale investments:	0.0	0.0
Level 3 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Asset-backed securities
Assets
Available-for-sale investments:	0.0	0.0
Level 3 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | U.S. government and agency securities
Assets
Available-for-sale investments:	0.0	0.0
Level 3 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Commercial paper
Assets
Available-for-sale investments:	0.0	0.0
Level 3 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Municipal securities
Assets
Available-for-sale investments:		0.0
Level 3 | Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Equity investments in unconsolidated entities
Assets
Available-for-sale investments:	$ 0.0	$ 0.0