Segments - Segment Reporting (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information, Profit (Loss)
Operating revenue	$ 29,899	$ 17,095	$ 47,007
Operating income (loss)	1,886	(12,469)	6,618
Interest expense (income), net	1,279	929	301
Depreciation and amortization	1,998	2,312	2,581
Restructuring charges	(19)	8,219	0
Total assets	72,459	71,996	64,532
Net fair value obligations, end of period	(497)	(156)	(4)
Capital expenditures	3,247	1,899	4,936
Fair value of obligation	(593)	(172)	(58)
Fair value of asset component	96	16	54
Operating Segments | Airline
Segment Reporting Information, Profit (Loss)
Operating revenue	26,670	15,945	46,910
Operating income (loss)	1,888	(12,253)	6,542
Interest expense (income), net	1,272	928	327
Depreciation and amortization	1,998	2,312	2,581
Restructuring charges	(19)	8,219
Total assets	70,360	70,548	62,793
Net fair value obligations, end of period	0	0	0
Capital expenditures	3,188	1,879	4,880
Operating Segments | Refinery
Segment Reporting Information, Profit (Loss)
Operating revenue	6,054	3,143	5,558
Operating income (loss)	(2)	(216)	76
Interest expense (income), net	7	1	(26)
Depreciation and amortization	95	99	99
Restructuring charges	0	0
Total assets	2,099	1,448	1,739
Net fair value obligations, end of period	(497)	(156)	(4)
Capital expenditures	59	20	56
Intersegment Sales/Other
Segment Reporting Information, Profit (Loss)
Depreciation and amortization	(95)	(99)	(99)
Intersegment Sales/Other | Sales to airline segment
Segment Reporting Information, Profit (Loss)
Operating revenue	(492)	(214)	(1,103)
Intersegment Sales/Other | Exchanged products
Segment Reporting Information, Profit (Loss)
Operating revenue	(2,293)	(1,472)	(3,963)
Intersegment Sales/Other | Sales of refined products
Segment Reporting Information, Profit (Loss)
Operating revenue	$ (40)	$ (307)	$ (395)