Inventories (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Schedule of Inventories
Refinery feedstocks	$ 1,949	$ 1,995
Refined petroleum products and blendstocks	3,579	3,567
Renewable diesel feedstocks and products	583	135
Ethanol feedstocks and products	328	273
Materials and supplies	313	295
Inventories	6,752	6,265
Inventories (Textual)
Excess of market value over carrying amount of LIFO inventories	6,300	5,200
LCM inventory valuation reserve				$ 2,500
Lower of cost or market (LCM) inventory valuation adjustment	0	0	$ 19
Liquidation of LIFO, cost increase (decrease)	(323)
Amount of non-LIFO inventory	$ 1,600	$ 1,400