SEGMENTS - Segment Reporting (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information, Profit (Loss)
Operating revenue	$ 50,582	$ 29,899	$ 17,095
Operating income (loss)	3,661	1,886	(12,469)
Interest expense (income), net	1,029	1,279	929
Depreciation and amortization	2,107	1,998	2,312
Restructuring charges	(124)	(19)	8,219
Total assets	72,288	72,459	71,996
Net fair value obligations, end of period	(226)	(497)	(156)
Capital expenditures	6,366	3,247	1,899
Operating Segments | Airline
Segment Reporting Information, Profit (Loss)
Operating revenue	45,605	26,670	15,945
Operating income (loss)	2,884	1,888	(12,253)
Interest expense (income), net	1,029	1,279	929
Depreciation and amortization	2,107	1,998	2,312
Restructuring charges	(124)	(19)	8,219
Total assets	69,355	70,417	70,548
Net fair value obligations, end of period	0	0	0
Capital expenditures	6,217	3,188	1,879
Operating Segments | Refinery
Segment Reporting Information, Profit (Loss)
Operating revenue	10,706	6,054	3,143
Operating income (loss)	777	(2)	(216)
Interest expense (income), net	12	7	1
Depreciation and amortization	93	95	99
Restructuring charges	0	0
Total assets	3,039	2,099	1,448
Net fair value obligations, end of period	(226)	(497)	(156)
Capital expenditures	149	59	20
Intersegment Sales/Other
Segment Reporting Information, Profit (Loss)
Interest expense (income), net	(12)	(7)	(1)
Depreciation and amortization	(93)	(95)	(99)
Total assets	(106)	(57)
Intersegment Sales/Other | Sales to airline segment
Segment Reporting Information, Profit (Loss)
Operating revenue	(1,976)	(492)	(214)
Intersegment Sales/Other | Exchanged products
Segment Reporting Information, Profit (Loss)
Operating revenue	(3,475)	(2,293)	(1,472)
Intersegment Sales/Other | Sales of refined products
Segment Reporting Information, Profit (Loss)
Operating revenue	$ (278)	$ (40)	$ (307)