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Inventories (Notes)
6 Months Ended
Jun. 30, 2019
Inventory, Net [Abstract]  
Inventories
INVENTORIES
Inventories consisted of the following:
 
June 30, 2019
 
December 31, 2018
Natural gas, NGLs and refined products
$
793

 
$
833

Crude oil
622

 
506

Spare parts and other
417

 
338

Total inventories
$
1,832

 
$
1,677


We utilize commodity derivatives to manage price volatility associated with its natural gas inventories. Changes in fair value of designated hedged inventory are recorded in inventory on our consolidated balance sheets and cost of products sold in our consolidated statements of operations.