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Inventories, Net - Schedule of Inventories Net (Detail) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Inventory Disclosure [Abstract]    
Finished products $ 1,357 $ 1,327
Products in process 17 24
Raw materials 44 65
Supplies and expendable parts 122 162
Total inventories 1,540 1,578
Less: allowances (506) (463)
Inventories, net $ 1,034 $ 1,115