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Inventory, Linefill and Long-term Inventory (Details)
bbl in Thousands, $ in Millions
Jun. 30, 2024
USD ($)
$ / bbl
bbl
Dec. 31, 2023
USD ($)
$ / bbl
bbl
Inventory by category    
Inventory subtotal, carrying value $ 502 $ 548
Linefill subtotal, carrying value 980 976
Long-term inventory subtotal, carrying value 290 265
Total $ 1,772 $ 1,789
Crude oil    
Inventory by category    
Inventory, volumes (in barrels) | bbl 4,767 5,877
Linefill, volumes (in barrels) | bbl 15,581 15,409
Long-term inventory, volumes (in barrels) | bbl 3,267 3,256
Inventory subtotal, carrying value $ 340 $ 383
Linefill subtotal, carrying value 915 909
Long-term inventory subtotal, carrying value $ 257 $ 232
Inventory (price/unit of measure) (usd per barrel) | $ / bbl 71.32 65.17
Linefill (price/unit of measure) (usd per barrel) | $ / bbl 58.73 58.99
Long-term inventory (price/unit of measure (usd per barrel) | $ / bbl 78.67 71.25
NGL    
Inventory by category    
Inventory, volumes (in barrels) | bbl 6,276 5,957
Linefill, volumes (in barrels) | bbl 2,223 2,168
Long-term inventory, volumes (in barrels) | bbl 1,355 1,326
Inventory subtotal, carrying value $ 148 $ 154
Linefill subtotal, carrying value 65 67
Long-term inventory subtotal, carrying value $ 33 $ 33
Inventory (price/unit of measure) (usd per barrel) | $ / bbl 23.58 25.85
Linefill (price/unit of measure) (usd per barrel) | $ / bbl 29.24 30.90
Long-term inventory (price/unit of measure (usd per barrel) | $ / bbl 24.35 24.89
Other    
Inventory by category    
Inventory subtotal, carrying value $ 14 $ 11