Financial Instruments - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Gross unrealized losses			$ (19,000,000)		$ (3,000,000)
Amortized cost of cash equivalents and marketable securities	$ 1,401,000,000		1,401,000,000		1,341,000,000
Accrued interest	3,000,000		3,000,000		3,000,000
Aggregate fair value of securities with unrealized losses	989,000,000		989,000,000		795,000,000
Gross unrealized gains					1,000,000
Allowance for credit losses	0		0		0
Balance of strategic investment	17,000,000		17,000,000		16,000,000
Adjustments to carrying value of strategic investments			0		0
Unrecognized gain related to effective portion of changes in fair value of foreign currency forward contracts	$ 326,821,000	$ 464,127,000	$ 326,821,000	$ 464,127,000	489,218,000	$ 327,100,000	$ 430,243,000	$ 431,831,000
Closing price of common stock (in usd per share)	$ 74.07		$ 74.07
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of financial assets	$ 0		$ 0		0
Convertible debt | Convertible senior notes due 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest rate	0.25%		0.25%							0.25%
Aggregate principal amount	$ 26,000,000		$ 26,000,000							$ 575,000,000
Convertible debt | Convertible senior notes due 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest rate	0.625%		0.625%						0.625%
Aggregate principal amount	$ 1,150,000,000		$ 1,150,000,000						$ 1,150,000,000
Convertible debt | Level 2 | Convertible senior notes due 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value	973,000,000		973,000,000
Convertible debt | Level 2 | Convertible senior notes due 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value	177,000,000		$ 177,000,000
Foreign currency forward contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative, maximum maturity			15 months
Reclassification of net loss into earnings over next 12 months	1,000,000		$ 1,000,000
Notional value	537,000,000		537,000,000		$ 488,000,000
Loss recognized in AOCI	6,000,000	$ 1,000,000	(1,000,000)	$ (3,000,000)
Foreign currency forward contracts | AOCI, Derivative Qualifying as Hedge, Excluded Component, Parent
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unrecognized gain related to effective portion of changes in fair value of foreign currency forward contracts	$ 1,000,000		$ 1,000,000