Summary of Significant Accounting Policies, Supplementary Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental Cash Flow Information [Abstract]
Cash payments made for interest on long term debt, net of capitalized interest	$ 391	$ 463	$ 560
Cash payments for federal, foreign, state and local income taxes amount	256	20	190
Accrued capital expenditures	$ 5	$ 63	$ 17