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Inventories (Tables)
12 Months Ended
Dec. 31, 2024
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories at December 31 were:
Millions of Dollars
20242023
Crude oil and natural gas$907 676 
Materials and supplies902 722 
Total inventories$1,809 1,398 
Inventories valued on the LIFO basis$578 401