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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 subtotal, carrying value $ 367 $ 729
Linefill subtotal, carrying value 966 961
Long-term inventory subtotal, carrying value 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 subtotal, carrying value $ 213 $ 452
Linefill subtotal, carrying value 898 906
Long-term inventory subtotal, carrying value $ 224 $ 246
Inventory (price/unit of measure) (usd per unit) | $ / bbl 67.62 67.33
Linefill (price/unit of measure) (usd per unit) | $ / bbl 58.98 58.53
Long-term inventory (price/unit of measure) (usd per unit) | $ / 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 subtotal, carrying value $ 144 $ 270
Linefill subtotal, carrying value 68 55
Long-term inventory subtotal, carrying value $ 46 $ 38
Inventory (price/unit of measure) (usd per unit) | $ / bbl 28.32 37.06
Linefill (price/unit of measure) (usd per unit) | $ / bbl 31.37 29.32
Long-term inventory (price/unit of measure) (usd per unit) | $ / bbl 34.66 35.65
Other    
Inventory by category    
Inventory subtotal, carrying value $ 10 $ 7