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Financing Activities - Narrative (Details)
 3 Months Ended 9 Months Ended
Sep. 05, 2023
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
May 01, 2020
USD ($)
$ / shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Capital expenditures   $ 842,000,000 $ 1,072,000,000 $ 2,812,000,000 $ 2,568,000,000    
Payments of long-term debt and finance lease obligations   11,000,000 $ 1,679,000,000 78,000,000 $ 1,825,000,000    
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
Initial conversion ratio 0.0265590 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]              
Amounts outstanding   $ 1,611,000,000   $ 1,611,000,000      
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      
Notes Due 2027              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Effective interest rate   1.90%   1.90%