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Inventory, Linefill and Long-term Inventory (Details)
bbl in Thousands, $ in Millions
Mar. 31, 2022
USD ($)
$ / bbl
bbl
Dec. 31, 2021
USD ($)
$ / bbl
bbl
Inventory by category    
Inventory $ 527 $ 783
Linefill 919 907
Long-term inventory 374 253
Total $ 1,820 $ 1,943
Crude oil    
Inventory by category    
Inventory, Volumes (in barrels) | bbl 4,711 8,041
Linefill, Volumes (in barrels) | bbl 15,160 15,199
Long-term inventory, Volumes (in barrels) | bbl 3,289 2,973
Inventory $ 420 $ 544
Linefill 872 862
Long-term inventory $ 325 $ 209
Inventory (Price/Unit of measure) (in dollars per units) | $ / bbl 89.15 67.65
Linefill (Price/Unit of measure) (in dollars per units) | $ / bbl 57.52 56.71
Long-term inventory (Price/Unit of measure) (in dollars per units) | $ / bbl 98.81 70.30
NGL    
Inventory by category    
Inventory, Volumes (in barrels) | bbl 2,329 6,982
Linefill, Volumes (in barrels) | bbl 1,667 1,633
Long-term inventory, Volumes (in barrels) | bbl 1,071 1,135
Inventory $ 102 $ 234
Linefill 47 45
Long-term inventory $ 49 $ 44
Inventory (Price/Unit of measure) (in dollars per units) | $ / bbl 43.80 33.51
Linefill (Price/Unit of measure) (in dollars per units) | $ / bbl 28.19 27.56
Long-term inventory (Price/Unit of measure) (in dollars per units) | $ / bbl 45.75 38.77
Other    
Inventory by category    
Inventory $ 5 $ 5