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Inventories (Tables)
3 Months Ended
Mar. 31, 2025
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories consisted of the following:

 Millions of Dollars
 March 31
2025
December 31
2024
Crude oil and products$4,791 3,547 
Materials and supplies449 448 
$5,240 3,995