Debt - Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Total interest cost	$ 372	$ 417
Capitalized interest	(23)	(61)
Total interest expense, net of capitalized interest	349	356
Convertible Debt [Member]
Debt Instrument [Line Items]
Interest per contractual rate	0	12
Amortization of debt discount	0	5
Amortization of debt issuance costs	0	0
Total interest cost	0	17
Debt and Finance Leases Excluding Convertible Debt [Member]
Debt Instrument [Line Items]
Total interest cost	$ 372	$ 400