Debt - Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Total interest cost	$ 370	$ 401	$ 742	$ 818
Capitalized interest	(13)	(33)	(36)	(94)
Total interest expense, net of capitalized interest	357	368	706	724
Convertible Debt [Member]
Debt Instrument [Line Items]
Interest per contractual rate	0	11	0	23
Amortization of debt discount	0	3	0	8
Total interest cost	0	14	0	31
Debt and Finance Leases Excluding Convertible Debt [Member]
Debt Instrument [Line Items]
Total interest cost	$ 370	$ 387	$ 742	$ 787

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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