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Inventories
 6 Months Ended
Jun. 30, 2026
Inventory Disclosure [Abstract]  
INVENTORIES
3.    INVENTORIES

Inventories consisted of the following (in millions):
June 30,
2026		December 31,
2025
Refinery feedstocks$1,535 $1,880 
Refined petroleum products and blendstocks
4,168 4,182 
Renewable diesel feedstocks and products
1,185 809 
Ethanol feedstocks and products329 314 
Materials and supplies408 406 
Inventories$7,625 $7,591 

During the second quarter of 2026, we recognized a $44 million benefit in cost of materials and other resulting from the liquidation of LIFO inventory layers established in prior years at costs lower than current replacement costs. As discussed in Note 2, LIFO inventory levels related to our California operations declined during 2026 due to the phased idling of processing units and cessation of refining operations at the Benicia Refinery, which was completed by the end of April 2026. Consequently, inventory levels at December 31, 2026 are expected to remain below those at December 31, 2025.

As of June 30, 2026 and December 31, 2025, the replacement cost (market value) of LIFO inventories exceeded their LIFO carrying amounts by $7.5 billion and $2.6 billion, respectively. Our non-LIFO inventories accounted for $1.3 billion and $1.2 billion of our total inventories as of June 30, 2026 and December 31, 2025, respectively.