REVENUE RECOGNITION - Other Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Operating revenue	$ 58,048	$ 50,582	$ 29,899
Other
Disaggregation of Revenue [Line Items]
Operating revenue	8,416	9,314	6,348
Refinery
Disaggregation of Revenue [Line Items]
Operating revenue	3,379	4,977	3,229
Loyalty program
Disaggregation of Revenue [Line Items]
Operating revenue	3,093	2,597	1,770
Ancillary businesses
Disaggregation of Revenue [Line Items]
Operating revenue	840	846	793
Miscellaneous
Disaggregation of Revenue [Line Items]
Operating revenue	$ 1,104	$ 894	$ 556