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Inventories (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Inventory Disclosure [Abstract]    
Finished goods $ 377 $ 377
Raw materials 75 95
Work in process 527 490
Supplies 39 40
Total (approximates current cost) 1,018 1,002
Decrease to LIFO costs (18) (11)
Inventory 1,000 991
Recognized as:    
Inventories 950 915
Other assets 50 76
Inventories valued under LIFO $ 83 $ 52