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Debt - Schedule of Convertible Senior Notes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Debt Instrument [Line Items]
Interest Expense	$ 9,000,000	$ 29,000,000	$ 26,000,000	$ 99,000,000
Convertible senior notes:
Debt Instrument [Line Items]
Aggregate Principal Amount	1,672,000,000		1,672,000,000
Unamortized Debt Issuance Costs	13,000,000		13,000,000		$ 353,000,000
Fair Value	1,614,000,000		1,614,000,000		2,451,000,000
Contractual Coupon Interest	7,000,000	7,000,000	21,000,000	23,000,000
Amortization of Debt Discount		20,000,000		68,000,000
Amortization of Debt Issuance Costs	2,000,000	1,000,000	3,000,000	4,000,000
Interest Expense	9,000,000	28,000,000	24,000,000	95,000,000
Convertible senior notes: | 2026 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount	$ 499,000,000		$ 499,000,000
Stated Interest Rate	1.375%		1.375%
Effective Interest Rate	1.57%		1.57%
Unamortized Debt Issuance Costs	$ 4,000,000		$ 4,000,000		130,000,000
Fair Value	484,000,000		484,000,000		781,000,000
Contractual Coupon Interest	2,000,000	2,000,000	5,000,000	5,000,000
Amortization of Debt Discount		5,000,000		16,000,000
Amortization of Debt Issuance Costs	0	0	0	0
Interest Expense	2,000,000	7,000,000	5,000,000	21,000,000
Convertible senior notes: | 2025 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount	$ 565,000,000		$ 565,000,000
Stated Interest Rate	2.75%		2.75%
Effective Interest Rate	3.20%		3.20%
Unamortized Debt Issuance Costs	$ 6,000,000		$ 6,000,000		122,000,000
Fair Value	522,000,000		522,000,000		725,000,000
Contractual Coupon Interest	4,000,000	4,000,000	12,000,000	12,000,000
Amortization of Debt Discount		7,000,000		21,000,000
Amortization of Debt Issuance Costs	1,000,000	0	2,000,000	1,000,000
Interest Expense	5,000,000	11,000,000	14,000,000	34,000,000
Convertible senior notes: | 2024 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount	$ 608,000,000		$ 608,000,000
Stated Interest Rate	0.75%		0.75%
Effective Interest Rate	1.02%		1.02%
Unamortized Debt Issuance Costs	$ 3,000,000		$ 3,000,000		101,000,000
Fair Value	608,000,000		608,000,000		$ 945,000,000
Contractual Coupon Interest	1,000,000	1,000,000	4,000,000	3,000,000
Amortization of Debt Discount		8,000,000		23,000,000
Amortization of Debt Issuance Costs	1,000,000	1,000,000	1,000,000	2,000,000
Interest Expense	2,000,000	10,000,000	5,000,000	28,000,000
Convertible senior notes: | 2023 Notes
Debt Instrument [Line Items]
Contractual Coupon Interest	0	0	0	3,000,000
Amortization of Debt Discount		0		8,000,000
Amortization of Debt Issuance Costs	0	0	0	1,000,000
Interest Expense	$ 0	$ 0	$ 0	$ 12,000,000

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