Financing Activities - Narrative (Details)		3 Months Ended		6 Months Ended
	Jun. 20, 2023	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	May 01, 2020 USD ($) $ / shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capital expenditures		$ 925,000,000	$ 987,000,000	$ 1,971,000,000	$ 1,497,000,000
Payments of long-term debt and finance lease obligations		8,000,000	$ 53,000,000	67,000,000	$ 146,000,000
Convertible Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount		$ 1,600,000,000		$ 1,600,000,000		$ 1,600,000,000	$ 2,300,000,000
Stated interest rate							1.25%
Initial conversion ratio	0.0264038	0.0259909
Initial conversion price (in USD per share) | $ / shares							$ 38.48
Term (in years)				5 years
Convertible Debt | 1.25% Convertible Notes due 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate		1.25%		1.25%
Amounts outstanding		$ 1,611,000,000		$ 1,611,000,000
Notes Due 2027
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Effective interest rate		1.90%		1.90%
Line of Credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Borrowing capacity		$ 1,000,000,000		$ 1,000,000,000
Amounts outstanding		$ 0		$ 0