Schedule of Consolidated VIEs, Carrying Amounts of Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Variable Interest Entity [Line Items]
Cash and cash equivalents and end of period	$ 3,143	$ 2,988	$ 4,133
Other current assets	1,303	934
Net property	20,347	20,555
Deferred charges and other assets	1,505	1,456
Total Assets	63,335	62,990
Accrued Liabilities, Current	3,233	3,481
Long-Term Debt	14,108	14,280
Other noncurrent obligations	6,767	6,602
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents and end of period	48	40
Other current assets	38	40
Net property	181	184
Deferred charges and other assets	15	15
Total Assets	282	279
Accrued Liabilities, Current	34	37
Long-Term Debt	2	3
Other noncurrent obligations	13	13
Total Liabilities	$ 49	$ 53