Schedule of Consolidated VIEs, Carrying Amounts of Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Variable Interest Entity [Line Items]
Cash and cash equivalents and end of period	$ 2,367	$ 2,988	$ 3,491
Other current assets	1,460	934
Net property	20,160	20,555
Deferred charges and other assets	1,422	1,456
Total Assets	62,143	62,990
Accrued Liabilities, Current	3,384	3,481
Long-Term Debt	13,065	14,280
Other noncurrent obligations	6,646	6,602
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents and end of period	44	40
Other current assets	35	40
Net property	167	184
Deferred charges and other assets	14	15
Total Assets	260	279
Accrued Liabilities, Current	40	37
Long-Term Debt	1	3
Other noncurrent obligations	11	13
Total Liabilities	$ 52	$ 53