Debt, Interest Incurred (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest and Debt Expense, Net of Capitalized Interest
Interest and debt expense	$ 157	$ 164
Less: Capitalized interest	12	15
Interest and debt expense, net of capitalized interest	$ 145	$ 149