Revenue Recognition - Other Revenue (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Operating revenue	$ 9,348	$ 4,150
Other
Disaggregation of Revenue [Line Items]
Operating revenue	2,152	1,187
Refinery
Disaggregation of Revenue [Line Items]
Operating revenue	1,187	540
Loyalty program
Disaggregation of Revenue [Line Items]
Operating revenue	571	368
Ancillary businesses
Disaggregation of Revenue [Line Items]
Operating revenue	209	186
Miscellaneous
Disaggregation of Revenue [Line Items]
Operating revenue	$ 185	$ 93

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details