Debt and Other Financing - Narrative (Details)	1 Months Ended	3 Months Ended			9 Months Ended
	May 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) day	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Mar. 24, 2021 USD ($)
Debt Instrument
Long-term debt outstanding		$ 3,207,000,000			$ 3,207,000,000		$ 3,137,000,000
Gain on debt extinguishment		0		$ 96,000,000	100,000,000	$ 96,000,000
Long-term debt		3,207,000,000			3,207,000,000		3,137,000,000
Revolving Credit Facility
Debt Instrument
Long-term debt outstanding		0			0		0
Long-term debt		0			$ 0		0
Senior Secured Revolving Credit Facility | Revolving Credit Facility
Debt Instrument
Debt instrument, term					5 years
Maximum borrowing capacity								$ 600,000,000
Letters of credit outstanding, amount		76,000,000			$ 76,000,000
Long-term debt outstanding		0			0
Long-term debt		$ 0			$ 0
2025 Accreting Notes
Debt Instrument
Effective interest rate, percentage		2.70%			2.70%
Convertible Debt
Debt Instrument
Contractual interest expense		$ 15,000,000		7,000,000	$ 40,000,000	21,000,000
Debt discount amortization		3,000,000		2,000,000	6,000,000	6,000,000
Convertible Debt | 2028 Notes
Debt Instrument
Long-term debt outstanding		679,000,000			679,000,000		0
Principal Amount	$ 690,000,000	$ 690,000,000			$ 690,000,000		0
Interest rate, stated percentage	3.50%	3.50%			3.50%
Effective interest rate, percentage		3.80%			3.80%
Option included in issuance of notes	$ 90,000,000
Proceeds from issuance of convertible notes, net of issuance costs			$ 591,000,000
Long-term debt		$ 679,000,000			$ 679,000,000		0
Debt, fair value		1,000,000,000			1,000,000,000
Converted value exceeded the principal value					223,000,000
Convertible Debt | 2025 Accreting Notes
Debt Instrument
Long-term debt outstanding		38,000,000			38,000,000		37,000,000
Principal Amount		$ 38,000,000			$ 38,000,000		37,000,000
Interest rate, stated percentage		2.50%			2.50%
Trading days (whether or not consecutively) | day					20
Trading days (consecutive) | day					30
Percentage of conversion stock price					276.00%
Principal amount of Notes					$ 1,000
Redemption price, percentage of principal amount to be redeemed					100.00%
Long-term debt		$ 38,000,000			$ 38,000,000		37,000,000
Debt, fair value		31,000,000			31,000,000
Converted value exceeded the principal value					$ 0
Convertible Debt | Non-Accreting Notes
Debt Instrument
Trading days (whether or not consecutively) | day					20
Trading days (consecutive) | day					30
Percentage of conversion stock price					130.00%
During number of business day period					5 days
Consecutive trading day period (after any)					10 days
Principal amount of Notes					$ 1,000
Measurement period percentage (less than)					98.00%
Convertible Debt | Senior Note Due 2024 And 2025
Debt Instrument
Long-term debt outstanding			614,000,000
Repayments of debt			514,000,000
Gain on debt extinguishment			100,000,000	96,000,000		96,000,000
Long-term debt			614,000,000
Convertible Debt | 2024 Notes
Debt Instrument
Long-term debt outstanding		117,000,000			$ 117,000,000		199,000,000
Principal Amount		$ 117,000,000			$ 117,000,000		200,000,000
Interest rate, stated percentage		1.125%			1.125%
Effective interest rate, percentage		1.50%			1.50%
Repurchase of aggregate principal amount			83,000,000	375,000,000		375,000,000
Long-term debt		$ 117,000,000			$ 117,000,000		199,000,000
Debt, fair value		115,000,000			115,000,000
Converted value exceeded the principal value					0
Convertible Debt | 2025 Notes
Debt Instrument
Long-term debt outstanding		751,000,000			751,000,000		1,281,000,000
Principal Amount		$ 754,000,000			$ 754,000,000		1,289,000,000
Interest rate, stated percentage		0.625%			0.625%
Effective interest rate, percentage		0.90%			0.90%
Repurchase of aggregate principal amount			$ 535,000,000	$ 229,000,000		$ 229,000,000
Long-term debt		$ 751,000,000			$ 751,000,000		1,281,000,000
Debt, fair value		650,000,000			650,000,000
Converted value exceeded the principal value					0
Convertible Debt | 2026 Notes
Debt Instrument
Long-term debt outstanding		943,000,000			943,000,000		942,000,000
Principal Amount		$ 949,000,000			$ 949,000,000		949,000,000
Interest rate, stated percentage		1.00%			1.00%
Effective interest rate, percentage		1.20%			1.20%
Long-term debt		$ 943,000,000			$ 943,000,000		942,000,000
Debt, fair value		771,000,000			771,000,000
Converted value exceeded the principal value					0
Convertible Debt | 2027 Notes
Debt Instrument
Long-term debt outstanding		679,000,000			679,000,000		678,000,000
Principal Amount		$ 690,000,000			$ 690,000,000		690,000,000
Interest rate, stated percentage		3.25%			3.25%
Effective interest rate, percentage		3.60%			3.60%
Long-term debt		$ 679,000,000			$ 679,000,000		$ 678,000,000
Debt, fair value		$ 841,000,000			841,000,000
Converted value exceeded the principal value					$ 0
Convertible Debt | Indentures
Debt Instrument
Default percentage of aggregate principal amount, of notes outstanding (not less than)					25.00%