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Inventories - Schedule of Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Inventory Disclosure [Abstract]    
Crude oil and natural gas $ 723 $ 676
Materials and supplies 720 722
Total inventories 1,443 1,398
Inventories valued on the LIFO basis $ 437 $ 401