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Inventory, Linefill and Base Gas and Long-term Inventory (Tables)
9 Months Ended
Sep. 30, 2020
Inventory, Linefill and Base Gas and Long-term Inventory  
Schedule of inventory, linefill and base gas and long-term inventory
Inventory, linefill and base gas and long-term inventory consisted of the following (barrels and natural gas volumes in thousands and carrying value in millions):

 September 30, 2020December 31, 2019
 VolumesUnit of
Measure
Carrying
Value
Price/
Unit (1)
VolumesUnit of
Measure
Carrying
Value
Price/
Unit (1)
Inventory        
Crude oil15,332 barrels$449 $29.29 8,613 barrels$450 $52.25 
NGL16,144 barrels226 $14.00 7,574 barrels142 $18.75 
OtherN/A N/AN/A 12 N/A
Inventory subtotal  683    604  
Linefill and base gas        
Crude oil14,496 barrels813 $56.08 14,316 barrels826 $57.70 
NGL1,642 barrels43 $26.19 1,701 barrels47 $27.63 
Natural gas25,576 Mcf110 $4.30 24,976 Mcf108 $4.32 
Linefill and base gas subtotal  966    981  
Long-term inventory        
Crude oil2,773 barrels102 $36.78 2,598 barrels152 $58.51 
NGL1,354 barrels18 $13.29 1,707 barrels30 $17.57 
Long-term inventory subtotal  120    182  
Total  $1,769    $1,767  

(1)Price per unit of measure is comprised of a weighted average associated with various grades, qualities and locations. Accordingly, these prices may not coincide with any published benchmarks for such products.