Marketable Securities - Schedule of Fair Value and Unrealized Losses of Debt Securities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Fair Value - Less than 12 Months	$ 3,300.9	$ 6,516.3
Unrealized Loss - Less than 12 months	(76.9)	(42.3)
Fair Value - 12 Months or Greater	4,332.2	0.0
Unrealized Loss - 12 Months or Greater	(225.9)	0.0
Fair Value - Total	7,633.1	6,516.3
Unrealized Loss - Total	(302.8)	(42.3)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Fair Value - Less than 12 Months	2,445.4	5,889.3
Unrealized Loss - Less than 12 months	(73.1)	(40.9)
Fair Value - 12 Months or Greater	4,200.4	0.0
Unrealized Loss - 12 Months or Greater	(218.0)	0.0
Fair Value - Total	6,645.8	5,889.3
Unrealized Loss - Total	(291.1)	(40.9)
U.S. government and government agency obligations
Debt Securities, Available-for-sale [Line Items]
Fair Value - Less than 12 Months	785.2	90.0
Unrealized Loss - Less than 12 months	(2.0)	(0.8)
Fair Value - 12 Months or Greater	71.0	0.0
Unrealized Loss - 12 Months or Greater	(4.9)	0.0
Fair Value - Total	856.2	90.0
Unrealized Loss - Total	(6.9)	(0.8)
Sovereign bonds
Debt Securities, Available-for-sale [Line Items]
Fair Value - Less than 12 Months	18.6	37.0
Unrealized Loss - Less than 12 months	(1.1)	(0.3)
Fair Value - 12 Months or Greater	45.6	0.0
Unrealized Loss - 12 Months or Greater	(1.9)	0.0
Fair Value - Total	64.2	37.0
Unrealized Loss - Total	(3.0)	(0.3)
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Fair Value - Less than 12 Months		295.7
Unrealized Loss - Less than 12 months		(0.1)
Fair Value - 12 Months or Greater		0.0
Unrealized Loss - 12 Months or Greater		0.0
Fair Value - Total		295.7
Unrealized Loss - Total		(0.1)
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Fair Value - Less than 12 Months	40.2	169.4
Unrealized Loss - Less than 12 months	(0.1)	(0.1)
Fair Value - 12 Months or Greater	0.0	0.0
Unrealized Loss - 12 Months or Greater	0.0	0.0
Fair Value - Total	40.2	169.4
Unrealized Loss - Total	(0.1)	(0.1)
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Fair Value - Less than 12 Months	11.5	34.9
Unrealized Loss - Less than 12 months	(0.6)	(0.1)
Fair Value - 12 Months or Greater	15.2	0.0
Unrealized Loss - 12 Months or Greater	(1.1)	0.0
Fair Value - Total	26.7	34.9
Unrealized Loss - Total	$ (1.7)	$ (0.1)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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