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Inventory, Linefill and Base Gas and Long-term Inventory (Tables)
12 Months Ended
Dec. 31, 2019
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):

December 31, 2019December 31, 2018
VolumesUnit of
Measure
Carrying
Value
Price/
Unit (1)
VolumesUnit of
Measure
Carrying
Value
Price/
Unit (1)
Inventory
Crude oil8,613  barrels$450  $52.25  9,657  barrels$367  $38.00  
NGL7,574  barrels142  $18.75  10,384  barrels262  $25.23  
OtherN/A  12  N/A  N/A  11  N/A  
Inventory subtotal604  640  
Linefill and base gas
Crude oil14,316  barrels826  $57.70  13,312  barrels761  $57.17  
NGL1,701  barrels47  $27.63  1,730  barrels47  $27.17  
Natural gas24,976  Mcf108  $4.32  24,976  Mcf108  $4.32  
Linefill and base gas subtotal981  916  
Long-term inventory
Crude oil2,598  barrels152  $58.51  1,890  barrels79  $41.80  
NGL1,707  barrels30  $17.57  2,368  barrels57  $24.07  
Long-term inventory subtotal182  136  
Total$1,767  $1,692  

(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.