FAIR VALUE MEASUREMENTS - Schedule of Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Assets
Available-for-sale investments:	$ 836.7	$ 1,021.3
Bank time deposits
Assets
Available-for-sale investments:	0.0	13.9
Corporate debt securities
Assets
Available-for-sale investments:	120.6	462.3
Asset-backed securities
Assets
Available-for-sale investments:	51.1	68.8
U.S. government and agency securities
Assets
Available-for-sale investments:	248.6	237.1
Commercial paper
Assets
Available-for-sale investments:	416.4	236.5
Municipal securities
Assets
Available-for-sale investments:	0.0	2.7
Fair Value on a Recurring Basis | Estimate of Fair Value Measurement
Assets
Cash equivalents	2,810.2	2,379.9
Investments held for deferred compensation plans	154.5	146.6
Derivatives	11.3	82.1
Assets	3,817.8	3,635.4
Liabilities
Derivatives	59.6	8.2
Contingent consideration liabilities	16.5	16.5
Other	6.1	5.0
Liabilities	82.2	29.7
Fair Value on a Recurring Basis | Bank time deposits | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:		13.9
Fair Value on a Recurring Basis | Corporate debt securities | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:	120.6	462.3
Fair Value on a Recurring Basis | Asset-backed securities | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:	51.1	68.8
Fair Value on a Recurring Basis | U.S. government and agency securities | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:	248.6	237.1
Fair Value on a Recurring Basis | Commercial paper | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:	416.4	236.5
Fair Value on a Recurring Basis | Municipal securities | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:		2.7
Fair Value on a Recurring Basis | Equity investments in unconsolidated entities | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:	5.1	5.5
Fair Value on a Recurring Basis | Level 1 | Estimate of Fair Value Measurement
Assets
Cash equivalents	1,613.1	1,394.4
Investments held for deferred compensation plans	154.5	146.6
Derivatives	0.0	0.0
Assets	1,772.7	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
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 | U.S. 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
Fair Value on a Recurring Basis | Level 1 | Equity investments in unconsolidated entities | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:	5.1	5.5
Fair Value on a Recurring Basis | Level 2 | Estimate of Fair Value Measurement
Assets
Cash equivalents	1,197.1	985.5
Investments held for deferred compensation plans	0.0	0.0
Derivatives	11.3	82.1
Assets	2,045.1	2,088.9
Liabilities
Derivatives	59.6	8.2
Contingent consideration liabilities	0.0	0.0
Other	0.0	0.0
Liabilities	59.6	8.2
Fair Value on a Recurring Basis | Level 2 | Bank time deposits | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:		13.9
Fair Value on a Recurring Basis | Level 2 | Corporate debt securities | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:	120.6	462.3
Fair Value on a Recurring Basis | Level 2 | Asset-backed securities | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:	51.1	68.8
Fair Value on a Recurring Basis | Level 2 | U.S. government and agency securities | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:	248.6	237.1
Fair Value on a Recurring Basis | Level 2 | Commercial paper | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:	416.4	236.5
Fair Value on a Recurring Basis | Level 2 | Municipal securities | Estimate of Fair Value Measurement
Assets
Available-for-sale investments:		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
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 | U.S. 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
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