Annual report pursuant to Section 13 and 15(d)

Debt - Interest Expense (Details)

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Debt - Interest Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]      
Total interest cost $ 1,005 $ 972 $ 936
Capitalized interest (96) (87) (203)
Total interest expense, net of capitalized interest $ 909 $ 885 $ 733