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Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Sep. 30, 2023
Inventories      
Finished goods $ 824 $ 868 $ 894
Raw materials 175 151 152
Operating supplies 51 52 52
Inventories $ 1,050 $ 1,071 $ 1,098