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Inventories
9 Months Ended
Sep. 30, 2024
Inventory Disclosure [Abstract]  
INVENTORIES
3.    INVENTORIES

Inventories consisted of the following (in millions):
September 30,
2024
December 31,
2023
Refinery feedstocks$1,317 $2,223 
Refined petroleum products and blendstocks
3,976 3,790 
Renewable diesel feedstocks and products
1,081 913 
Ethanol feedstocks and products313 313 
Materials and supplies361 344 
Inventories$7,048 $7,583 

As of September 30, 2024 and December 31, 2023, the replacement cost (market value) of last-in, first-out (LIFO) inventories exceeded their LIFO carrying amounts by $3.8 billion and $4.4 billion, respectively. Our non-LIFO inventories accounted for $1.4 billion and $1.5 billion of our total inventories as of September 30, 2024 and December 31, 2023, respectively.