Debt and Finance Lease Obligations, Interest Incurred (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest and Debt Expense, Net of Capitalized Interest
Interest and debt expense	$ 651	$ 638	$ 544
Less: Capitalized interest	48	75	90
Interest and debt expense, net of capitalized interest	$ 603	$ 563	$ 454