Segment Information - Schedule of Selected Financial Information by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Selected Information [Line Items]
Operating Revenues and Other	$ 7,407	$ 4,139	$ 11,390	$ 7,833
Operating Income (Loss)	2,903	1,171	3,449	2,103
Other Income (Expense), Net	27	(2)	26	(6)
Interest Expense, Net	(48)	(45)	(96)	(92)
Income Before Income Taxes	2,882	1,124	3,379	2,005
Operating Segments
Selected Information [Line Items]
Operating Revenues and Other	7,407	4,139	11,390	7,833
Operating Income (Loss)	2,903	1,171	3,449	2,103
Segment Reconciling Items
Selected Information [Line Items]
Other Income (Expense), Net	27	(2)	26	(6)
Interest Expense, Net	(48)	(45)	(96)	(92)
United States | Operating Segments
Selected Information [Line Items]
Operating Revenues and Other	7,338	3,995	11,252	7,601
Operating Income (Loss)	2,885	1,077	3,404	1,967
Trinidad | Operating Segments
Selected Information [Line Items]
Operating Revenues and Other	69	81	138	157
Operating Income (Loss)	25	41	59	84
Other International | Operating Segments
Selected Information [Line Items]
Operating Revenues and Other	0	63	0	75
Operating Income (Loss)	$ (7)	$ 53	$ (14)	$ 52