FAIR VALUE MEASUREMENTS - Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021 |
Assets | | |
Available-for-sale investments | $ 1,836.6 | $ 2,183.7 |
Bank time deposits | | |
Assets | | |
Available-for-sale investments | 4.5 | 2.5 |
Corporate debt securities | | |
Assets | | |
Available-for-sale investments | 1,227.7 | 1,390.8 |
Asset-backed securities | | |
Assets | | |
Available-for-sale investments | 440.2 | 512.6 |
United States government and agency securities | | |
Assets | | |
Available-for-sale investments | 138.5 | 147.3 |
Commercial paper | | |
Assets | | |
Available-for-sale investments | 23.1 | 127.7 |
Municipal securities | | |
Assets | | |
Available-for-sale investments | 2.6 | 2.8 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | | |
Assets | | |
Cash equivalents | 169.4 | 45.9 |
Investments held for deferred compensation plans | 120.6 | 130.7 |
Derivatives | 67.1 | 55.3 |
Assets | 2,193.7 | 2,415.6 |
Liabilities | | |
Derivatives | 3.8 | 3.9 |
Deferred compensation plans | 121.1 | 130.9 |
Contingent consideration liabilities | 59.1 | 62 |
Other liability | 14 | 14 |
Liabilities | 198 | 210.8 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Bank time deposits | | |
Assets | | |
Available-for-sale investments | 4.5 | 2.5 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Corporate debt securities | | |
Assets | | |
Available-for-sale investments | 1,227.7 | 1,390.8 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Asset-backed securities | | |
Assets | | |
Available-for-sale investments | 440.2 | 512.6 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | United States government and agency securities | | |
Assets | | |
Available-for-sale investments | 138.5 | 147.3 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Commercial paper | | |
Assets | | |
Available-for-sale investments | 23.1 | 127.7 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Municipal securities | | |
Assets | | |
Available-for-sale investments | 2.6 | 2.8 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 1 | | |
Assets | | |
Cash equivalents | 16.9 | 15.2 |
Investments held for deferred compensation plans | 120.6 | 130.7 |
Derivatives | 0 | 0 |
Assets | 167.4 | 174.3 |
Liabilities | | |
Derivatives | 0 | 0 |
Deferred compensation plans | 121.1 | 130.9 |
Contingent consideration liabilities | 0 | 0 |
Other liability | 0 | 0 |
Liabilities | 121.1 | 130.9 |
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 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 1 | Asset-backed securities | | |
Assets | | |
Available-for-sale investments | 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 | 29.9 | 28.4 |
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 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | | |
Assets | | |
Cash equivalents | 152.5 | 30.7 |
Investments held for deferred compensation plans | 0 | 0 |
Derivatives | 67.1 | 55.3 |
Assets | 2,026.3 | 2,241.3 |
Liabilities | | |
Derivatives | 3.8 | 3.9 |
Deferred compensation plans | 0 | 0 |
Contingent consideration liabilities | 0 | 0 |
Other liability | 0 | 0 |
Liabilities | 3.8 | 3.9 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | Bank time deposits | | |
Assets | | |
Available-for-sale investments | 4.5 | 2.5 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | Corporate debt securities | | |
Assets | | |
Available-for-sale investments | 1,227.7 | 1,390.8 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | Asset-backed securities | | |
Assets | | |
Available-for-sale investments | 440.2 | 512.6 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | United States government and agency securities | | |
Assets | | |
Available-for-sale investments | 108.6 | 118.9 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | Commercial paper | | |
Assets | | |
Available-for-sale investments | 23.1 | 127.7 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 2 | Municipal securities | | |
Assets | | |
Available-for-sale investments | 2.6 | 2.8 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 3 | | |
Assets | | |
Cash equivalents | 0 | 0 |
Investments held for deferred compensation plans | 0 | 0 |
Derivatives | 0 | 0 |
Assets | 0 | 0 |
Liabilities | | |
Derivatives | 0 | 0 |
Deferred compensation plans | 0 | 0 |
Contingent consideration liabilities | 59.1 | 62 |
Other liability | 14 | 14 |
Liabilities | 73.1 | 76 |
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 |
Estimate of Fair Value Measurement | Fair Value on a Recurring Basis | Level 3 | Asset-backed securities | | |
Assets | | |
Available-for-sale investments | 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 |
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 |