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Revenue (Disaggregated by Product Line) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Sales and other operating revenues	[1]	$ 35,107	$ 40,917	$ 105,727	$ 112,124
Refining & Marketing
Sales and other operating revenues	[1]	33,775	39,625	101,914	108,455
Refining & Marketing | Refined products
Sales and other operating revenues		31,462	36,971	94,803	101,758
Refining & Marketing | Crude oil
Sales and other operating revenues		1,826	2,188	5,713	5,393
Refining & Marketing | Services and other
Sales and other operating revenues		487	466	1,398	1,304
Midstream
Sales and other operating revenues	[1]	1,332	1,292	3,813	3,669
Midstream | Refined products
Sales and other operating revenues		431	477	1,197	1,274
Midstream | Services and other
Sales and other operating revenues		$ 901	$ 815	$ 2,616	$ 2,395
[1] Includes sales to related parties. See Note 6 for additional information.

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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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