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Marketable Securities and Fair Value Measurements - Summary of Available-for-Sale Marketable Securities (Details) - Level 2 - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	$ 1,005.9	$ 1,143.2
Gross Unrealized Gains	0.2	0.0
Gross Unrealized Losses	(12.8)	(19.2)
Fair Value	993.3	1,124.0
Corporate Bonds Maturing 2023-2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	688.8
Gross Unrealized Gains	0.0
Gross Unrealized Losses	(6.4)
Fair Value	682.4
Corporate Bonds Maturing 2024-2026
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	206.3
Gross Unrealized Gains	0.1
Gross Unrealized Losses	(6.0)
Fair Value	200.4
Government Securities Maturing 2023-2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	56.1
Gross Unrealized Gains	0.0
Gross Unrealized Losses	(0.1)
Fair Value	56.0
Government Securities Maturing 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	54.7
Gross Unrealized Gains	0.1
Gross Unrealized Losses	(0.3)
Fair Value	$ 54.5
Corporate Bonds Maturing 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost		802.7
Gross Unrealized Gains		0.0
Gross Unrealized Losses		(9.3)
Fair Value		793.4
Corporate Bonds Maturing 2024-2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost		205.3
Gross Unrealized Gains		0.0
Gross Unrealized Losses		(9.2)
Fair Value		196.1
Government Securities Maturing 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost		61.9
Gross Unrealized Gains		0.0
Gross Unrealized Losses		(0.4)
Fair Value		61.5
Government Securities Maturing 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost		73.3
Gross Unrealized Gains		0.0
Gross Unrealized Losses		(0.3)
Fair Value		$ 73.0

X

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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