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Inventory, Linefill and Long-term Inventory (Details)
bbl in Thousands, $ in Millions
Mar. 31, 2023
USD ($)
$ / bbl
bbl
Dec. 31, 2022
USD ($)
$ / bbl
bbl
Inventory by category    
Inventory $ 463 $ 729
Linefill 962 961
Long-term inventory 257 284
Total $ 1,682 $ 1,974
Crude oil    
Inventory by category    
Inventory, Volumes (in barrels) | bbl 5,373 6,713
Linefill, Volumes (in barrels) | bbl 15,459 15,480
Long-term inventory, Volumes (in barrels) | bbl 3,136 3,102
Inventory $ 342 $ 452
Linefill 907 906
Long-term inventory $ 227 $ 246
Inventory (Price/Unit of measure) (in dollars per units) | $ / bbl 63.65 67.33
Linefill (Price/Unit of measure) (in dollars per units) | $ / bbl 58.67 58.53
Long-term inventory (Price/Unit of measure) (in dollars per units) | $ / bbl 72.39 79.30
NGL    
Inventory by category    
Inventory, Volumes (in barrels) | bbl 3,427 7,285
Linefill, Volumes (in barrels) | bbl 1,865 1,876
Long-term inventory, Volumes (in barrels) | bbl 1,063 1,066
Inventory $ 111 $ 270
Linefill 55 55
Long-term inventory $ 30 $ 38
Inventory (Price/Unit of measure) (in dollars per units) | $ / bbl 32.39 37.06
Linefill (Price/Unit of measure) (in dollars per units) | $ / bbl 29.49 29.32
Long-term inventory (Price/Unit of measure) (in dollars per units) | $ / bbl 28.22 35.65
Other    
Inventory by category    
Inventory $ 10 $ 7