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Inventories - Schedule of Inventories (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Inventory Disclosure [Abstract]    
Crude oil and natural gas $ 625 $ 641
Materials and supplies 611 578
Total Inventories 1,236 1,219
Inventories valued on the LIFO basis $ 443 $ 396