Marketable Securities - Schedule of Investments in Available For Sale Debt Securities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 10,280.8	$ 10,320.1
Unrealized Gains	10.6	0.9
Unrealized Losses	(240.1)	(302.8)
Fair Value	10,051.3	10,018.2
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	6,819.1	6,975.5
Unrealized Gains	4.8	0.0
Unrealized Losses	(231.7)	(291.1)
Fair Value	6,592.2	6,684.4
U.S. government and government agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	2,902.2	2,945.4
Unrealized Gains	5.5	0.9
Unrealized Losses	(4.3)	(6.9)
Fair Value	2,903.4	2,939.4
Sovereign bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	72.6	67.1
Unrealized Gains	0.1	0.0
Unrealized Losses	(2.3)	(3.0)
Fair Value	70.4	64.1
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	279.1	121.1
Unrealized Gains	0.1	0.0
Unrealized Losses	(0.1)	0.0
Fair Value	279.1	121.1
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	153.9	182.1
Unrealized Gains	0.0	0.0
Unrealized Losses	(0.2)	(0.1)
Fair Value	153.7	182.0
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	53.9	28.9
Unrealized Gains	0.1	0.0
Unrealized Losses	(1.5)	(1.7)
Fair Value	$ 52.5	$ 27.2