Fair Value Measurements - Financial Assets and Liabilities Subject to Fair Value Measurements (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Financial instruments carried at fair value (liability positions):
Long-term contingent consideration	$ (127.2)	$ (186.5)
Recurring Basis
Financial instruments carried at fair value (asset positions):
Derivative asset current, foreign currency forward contracts	191.6	44.5
Other assets, foreign currency forward contracts	9.1	2.0
Total financial assets	6,429.0	4,254.5
Financial instruments carried at fair value (liability positions):
Other current liabilities, foreign currency forward contracts	(0.0)	(5.6)
Long-term contingent consideration	(127.2)	(186.5)
Other long-term liabilities, foreign currency forward contracts	(0.0)	(2.7)
Total financial liabilities	(127.2)	(194.8)
Recurring Basis \| Level 1
Financial instruments carried at fair value (asset positions):
Derivative asset current, foreign currency forward contracts	0.0	0.0
Other assets, foreign currency forward contracts	0.0	0.0
Total financial assets	3,829.6	3,864.4
Financial instruments carried at fair value (liability positions):
Other current liabilities, foreign currency forward contracts	0.0	0.0
Long-term contingent consideration	0.0	0.0
Other long-term liabilities, foreign currency forward contracts	0.0	0.0
Total financial liabilities	0.0	0.0
Recurring Basis \| Level 2
Financial instruments carried at fair value (asset positions):
Derivative asset current, foreign currency forward contracts	191.6	44.5
Other assets, foreign currency forward contracts	9.1	2.0
Total financial assets	2,599.4	390.1
Financial instruments carried at fair value (liability positions):
Other current liabilities, foreign currency forward contracts	(0.0)	(5.6)
Long-term contingent consideration	0.0	0.0
Other long-term liabilities, foreign currency forward contracts	(0.0)	(2.7)
Total financial liabilities	(0.0)	(8.3)
Recurring Basis \| Level 3
Financial instruments carried at fair value (asset positions):
Derivative asset current, foreign currency forward contracts	0.0	0.0
Other assets, foreign currency forward contracts	0.0	0.0
Total financial assets	0.0	0.0
Financial instruments carried at fair value (liability positions):
Other current liabilities, foreign currency forward contracts	0.0	0.0
Long-term contingent consideration	(127.2)	(186.5)
Other long-term liabilities, foreign currency forward contracts	0.0	0.0
Total financial liabilities	(127.2)	(186.5)
Recurring Basis \| Money market funds
Financial instruments carried at fair value (asset positions):
Cash equivalents:	3,610.9	3,478.1
Recurring Basis \| Money market funds \| Level 1
Financial instruments carried at fair value (asset positions):
Cash equivalents:	3,610.9	3,478.1
Recurring Basis \| Money market funds \| Level 2
Financial instruments carried at fair value (asset positions):
Cash equivalents:	0.0	0.0
Recurring Basis \| Money market funds \| Level 3
Financial instruments carried at fair value (asset positions):
Cash equivalents:	0.0	0.0
Recurring Basis \| Time deposits
Financial instruments carried at fair value (asset positions):
Cash equivalents:	2,000.0	0.0
Recurring Basis \| Time deposits \| Level 1
Financial instruments carried at fair value (asset positions):
Cash equivalents:	0.0	0.0
Recurring Basis \| Time deposits \| Level 2
Financial instruments carried at fair value (asset positions):
Cash equivalents:	2,000.0	0.0
Recurring Basis \| Time deposits \| Level 3
Financial instruments carried at fair value (asset positions):
Cash equivalents:	0.0	0.0
Recurring Basis \| Commercial paper
Financial instruments carried at fair value (asset positions):
Cash equivalents:	18.2	0.0
Marketable securities:	269.1	252.7
Recurring Basis \| Commercial paper \| Level 1
Financial instruments carried at fair value (asset positions):
Cash equivalents:	0.0	0.0
Marketable securities:	0.0	0.0
Recurring Basis \| Commercial paper \| Level 2
Financial instruments carried at fair value (asset positions):
Cash equivalents:	18.2	0.0
Marketable securities:	269.1	252.7
Recurring Basis \| Commercial paper \| Level 3
Financial instruments carried at fair value (asset positions):
Cash equivalents:	0.0	0.0
Marketable securities:	0.0	0.0
Recurring Basis \| Corporate equity securities
Financial instruments carried at fair value (asset positions):
Marketable securities:	122.8	230.9
Recurring Basis \| Corporate equity securities \| Level 1
Financial instruments carried at fair value (asset positions):
Marketable securities:	78.2	230.9
Recurring Basis \| Corporate equity securities \| Level 2
Financial instruments carried at fair value (asset positions):
Marketable securities:	44.6	0.0
Recurring Basis \| Corporate equity securities \| Level 3
Financial instruments carried at fair value (asset positions):
Marketable securities:	0.0	0.0
Recurring Basis \| U.S. Treasury securities
Financial instruments carried at fair value (asset positions):
Marketable securities:	130.0	86.4
Recurring Basis \| U.S. Treasury securities \| Level 1
Financial instruments carried at fair value (asset positions):
Marketable securities:	130.0	86.4
Recurring Basis \| U.S. Treasury securities \| Level 2
Financial instruments carried at fair value (asset positions):
Marketable securities:	0.0	0.0
Recurring Basis \| U.S. Treasury securities \| Level 3
Financial instruments carried at fair value (asset positions):
Marketable securities:	0.0	0.0
Recurring Basis \| Government-sponsored enterprise securities
Financial instruments carried at fair value (asset positions):
Marketable securities:	10.5	69.0
Recurring Basis \| Government-sponsored enterprise securities \| Level 1
Financial instruments carried at fair value (asset positions):
Marketable securities:	10.5	69.0
Recurring Basis \| Government-sponsored enterprise securities \| Level 2
Financial instruments carried at fair value (asset positions):
Marketable securities:	0.0	0.0
Recurring Basis \| Government-sponsored enterprise securities \| Level 3
Financial instruments carried at fair value (asset positions):
Marketable securities:	0.0	0.0
Recurring Basis \| Corporate debt securities
Financial instruments carried at fair value (asset positions):
Marketable securities:	66.8	90.9
Recurring Basis \| Corporate debt securities \| Level 1
Financial instruments carried at fair value (asset positions):
Marketable securities:	0.0	0.0
Recurring Basis \| Corporate debt securities \| Level 2
Financial instruments carried at fair value (asset positions):
Marketable securities:	66.8	90.9
Recurring Basis \| Corporate debt securities \| Level 3
Financial instruments carried at fair value (asset positions):
Marketable securities:	$ 0.0	$ 0.0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of investment in marketable security.

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