Inventory, Linefill and Long-term Inventory (Details) bbl in Thousands, $ in Millions	Jun. 30, 2023 USD ($) $ / bbl bbl	Dec. 31, 2022 USD ($) $ / bbl bbl
Inventory by category
Inventory	$ 367	$ 729
Linefill	966	961
Long-term inventory	270	284
Total	$ 1,603	$ 1,974
Crude oil
Inventory by category
Inventory, Volumes (in barrels) | bbl	3,150	6,713
Linefill, Volumes (in barrels) | bbl	15,226	15,480
Long-term inventory, Volumes (in barrels) | bbl	3,254	3,102
Inventory	$ 213	$ 452
Linefill	898	906
Long-term inventory	$ 224	$ 246
Inventory (Price/Unit of measure) (in dollars per units) | $ / bbl	67.62	67.33
Linefill (Price/Unit of measure) (in dollars per units) | $ / bbl	58.98	58.53
Long-term inventory (Price/Unit of measure) (in dollars per units) | $ / bbl	68.84	79.30
NGL
Inventory by category
Inventory, Volumes (in barrels) | bbl	5,084	7,285
Linefill, Volumes (in barrels) | bbl	2,168	1,876
Long-term inventory, Volumes (in barrels) | bbl	1,327	1,066
Inventory	$ 144	$ 270
Linefill	68	55
Long-term inventory	$ 46	$ 38
Inventory (Price/Unit of measure) (in dollars per units) | $ / bbl	28.32	37.06
Linefill (Price/Unit of measure) (in dollars per units) | $ / bbl	31.37	29.32
Long-term inventory (Price/Unit of measure) (in dollars per units) | $ / bbl	34.66	35.65
Other
Inventory by category
Inventory	$ 10	$ 7