Inventory, Linefill and Long-term Inventory - Components of Inventory, Linefill and Long-term Inventory (Details) bbl in Thousands, $ in Millions	Dec. 31, 2022 USD ($) $ / bbl bbl	Dec. 31, 2021 USD ($) $ / bbl bbl
Inventory disclosures
Inventory	$ 729	$ 783
Linefill	961	907
Long-term inventory	284	253
Total	$ 1,974	$ 1,943
Crude oil
Inventory disclosures
Inventory, Volumes (in barrels) | bbl	6,713	8,041
Linefill, Volumes (in barrels) | bbl	15,480	15,199
Long-term inventory, Volumes (in barrels) | bbl	3,102	2,973
Inventory	$ 452	$ 544
Linefill	906	862
Long-term inventory	$ 246	$ 209
Inventory (Price/Unit of measure) (in dollars per unit) | $ / bbl	67.33	67.65
Linefill (Price/Unit of measure) (in dollars per unit) | $ / bbl	58.53	56.71
Long-term inventory (Price/Unit of measure) (in dollars per unit) | $ / bbl	79.30	70.30
NGL
Inventory disclosures
Inventory, Volumes (in barrels) | bbl	7,285	6,982
Linefill, Volumes (in barrels) | bbl	1,876	1,633
Long-term inventory, Volumes (in barrels) | bbl	1,066	1,135
Inventory	$ 270	$ 234
Linefill	55	45
Long-term inventory	$ 38	$ 44
Inventory (Price/Unit of measure) (in dollars per unit) | $ / bbl	37.06	33.51
Linefill (Price/Unit of measure) (in dollars per unit) | $ / bbl	29.32	27.56
Long-term inventory (Price/Unit of measure) (in dollars per unit) | $ / bbl	35.65	38.77
Other
Inventory disclosures
Inventory	$ 7	$ 5