Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivative assets:
Derivative assets	$ 126.7	$ 56.3
Money market funds
Equity securities:
Equity securities	420.8	382.0
Publicly-traded equity securities
Equity securities:
Equity securities	7.7	8.1
Fair Value, Measurements, Recurring
Available-for-sale debt securities:
Available-for-sale debt securities	465.7	857.1
Equity securities:
Equity securities	456.6	423.5
Derivative assets:
Derivative assets	126.7	56.3
Total assets measured at fair value on a recurring basis	1,049.0	1,336.9
Derivative liabilities:
Derivative liabilities	(125.0)	(26.5)
Total liabilities measured at fair value on a recurring basis	(125.0)	(26.5)
Fair Value, Measurements, Recurring | Cash equivalents
Derivative assets:
Total assets measured at fair value on a recurring basis	491.4	418.8
Fair Value, Measurements, Recurring | Short-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	210.3	315.5
Fair Value, Measurements, Recurring | Long-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	139.6	455.5
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets
Derivative assets:
Total assets measured at fair value on a recurring basis	3.2	23.9
Fair Value, Measurements, Recurring | Other long-term assets
Derivative assets:
Total assets measured at fair value on a recurring basis	204.5	123.2
Fair Value, Measurements, Recurring | Other accrued liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	(32.5)	(14.9)
Fair Value, Measurements, Recurring | Other long-term liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	(92.5)	(11.6)
Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative assets:
Derivative assets	1.3	9.2
Derivative liabilities:
Derivative liabilities	(37.6)	(24.0)
Fair Value, Measurements, Recurring | Interest rate contracts
Derivative assets:
Derivative assets	125.4	47.1
Derivative liabilities:
Derivative liabilities	(87.4)	(2.5)
Fair Value, Measurements, Recurring | Asset-backed and mortgage-backed securities
Available-for-sale debt securities:
Available-for-sale debt securities	36.6	138.6
Fair Value, Measurements, Recurring | Certificates of deposit
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	5.0
Fair Value, Measurements, Recurring | Commercial paper
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	75.8
Fair Value, Measurements, Recurring | Corporate debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	270.4	442.5
Fair Value, Measurements, Recurring | Foreign government debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	8.4	12.7
Fair Value, Measurements, Recurring | Time deposits
Available-for-sale debt securities:
Available-for-sale debt securities	70.6	35.2
Fair Value, Measurements, Recurring | U.S. government agency securities
Available-for-sale debt securities:
Available-for-sale debt securities	18.0	26.7
Fair Value, Measurements, Recurring | U.S. government securities
Available-for-sale debt securities:
Available-for-sale debt securities	8.8	73.6
Fair Value, Measurements, Recurring | Privately-held debt and redeemable preferred stock securities
Available-for-sale debt securities:
Available-for-sale debt securities	52.9	47.0
Fair Value, Measurements, Recurring | Money market funds
Equity securities:
Equity securities	420.8	382.0
Fair Value, Measurements, Recurring | Mutual funds
Equity securities:
Equity securities	28.1	33.4
Fair Value, Measurements, Recurring | Publicly-traded equity securities
Equity securities:
Equity securities	7.7	8.1
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Available-for-sale debt securities:
Available-for-sale debt securities	8.8	42.3
Equity securities:
Equity securities	456.6	423.5
Derivative assets:
Derivative assets	0.0	0.0
Total assets measured at fair value on a recurring basis	465.4	465.8
Derivative liabilities:
Derivative liabilities	0.0	0.0
Total liabilities measured at fair value on a recurring basis	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Cash equivalents
Derivative assets:
Total assets measured at fair value on a recurring basis	420.8	371.6
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Short-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	14.6	41.5
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Long-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	1.9	8.8
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Prepaid expenses and other current assets
Derivative assets:
Total assets measured at fair value on a recurring basis	2.4	15.1
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Other long-term assets
Derivative assets:
Total assets measured at fair value on a recurring basis	25.7	28.8
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Other accrued liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Other long-term liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative assets:
Derivative assets	0.0	0.0
Derivative liabilities:
Derivative liabilities	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Interest rate contracts
Derivative assets:
Derivative assets	0.0	0.0
Derivative liabilities:
Derivative liabilities	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Asset-backed and mortgage-backed securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Certificates of deposit
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Commercial paper
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Corporate debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Foreign government debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Time deposits
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | U.S. government agency securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | U.S. government securities
Available-for-sale debt securities:
Available-for-sale debt securities	8.8	42.3
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Privately-held debt and redeemable preferred stock securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Money market funds
Equity securities:
Equity securities	420.8	382.0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Mutual funds
Equity securities:
Equity securities	28.1	33.4
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Publicly-traded equity securities
Equity securities:
Equity securities	7.7	8.1
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring
Available-for-sale debt securities:
Available-for-sale debt securities	404.0	767.8
Equity securities:
Equity securities	0.0	0.0
Derivative assets:
Derivative assets	126.7	56.3
Total assets measured at fair value on a recurring basis	530.7	824.1
Derivative liabilities:
Derivative liabilities	(125.0)	(26.5)
Total liabilities measured at fair value on a recurring basis	(125.0)	(26.5)
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Cash equivalents
Derivative assets:
Total assets measured at fair value on a recurring basis	70.6	47.2
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Short-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	195.7	274.0
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Long-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	137.7	446.7
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Prepaid expenses and other current assets
Derivative assets:
Total assets measured at fair value on a recurring basis	0.8	8.8
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Other long-term assets
Derivative assets:
Total assets measured at fair value on a recurring basis	125.9	47.4
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Other accrued liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	(32.5)	(14.9)
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Other long-term liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	(92.5)	(11.6)
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative assets:
Derivative assets	1.3	9.2
Derivative liabilities:
Derivative liabilities	(37.6)	(24.0)
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Interest rate contracts
Derivative assets:
Derivative assets	125.4	47.1
Derivative liabilities:
Derivative liabilities	(87.4)	(2.5)
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Asset-backed and mortgage-backed securities
Available-for-sale debt securities:
Available-for-sale debt securities	36.6	138.6
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Certificates of deposit
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	5.0
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Commercial paper
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	75.8
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Corporate debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	270.4	442.5
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Foreign government debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	8.4	12.7
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Time deposits
Available-for-sale debt securities:
Available-for-sale debt securities	70.6	35.2
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | U.S. government agency securities
Available-for-sale debt securities:
Available-for-sale debt securities	18.0	26.7
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | U.S. government securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	31.3
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Privately-held debt and redeemable preferred stock securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Money market funds
Equity securities:
Equity securities	0.0	0.0
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Mutual funds
Equity securities:
Equity securities	0.0	0.0
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Publicly-traded equity securities
Equity securities:
Equity securities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring
Available-for-sale debt securities:
Available-for-sale debt securities	52.9	47.0
Equity securities:
Equity securities	0.0	0.0
Derivative assets:
Derivative assets	0.0	0.0
Total assets measured at fair value on a recurring basis	52.9	47.0
Derivative liabilities:
Derivative liabilities	0.0	0.0
Total liabilities measured at fair value on a recurring basis	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Cash equivalents
Derivative assets:
Total assets measured at fair value on a recurring basis	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Short-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Long-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Prepaid expenses and other current assets
Derivative assets:
Total assets measured at fair value on a recurring basis	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Other long-term assets
Derivative assets:
Total assets measured at fair value on a recurring basis	52.9	47.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Other accrued liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Other long-term liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative assets:
Derivative assets	0.0	0.0
Derivative liabilities:
Derivative liabilities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Interest rate contracts
Derivative assets:
Derivative assets	0.0	0.0
Derivative liabilities:
Derivative liabilities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Asset-backed and mortgage-backed securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Certificates of deposit
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Commercial paper
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Corporate debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Foreign government debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Time deposits
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | U.S. government agency securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | U.S. government securities
Available-for-sale debt securities:
Available-for-sale debt securities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Privately-held debt and redeemable preferred stock securities
Available-for-sale debt securities:
Available-for-sale debt securities	52.9	47.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Money market funds
Equity securities:
Equity securities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Mutual funds
Equity securities:
Equity securities	0.0	0.0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Publicly-traded equity securities
Equity securities:
Equity securities	$ 0.0	$ 0.0