Inventories (Schedule of Inventory) (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Finished products	$ 1,237	$ 1,021
Work in process	254	187
Raw materials	697	490
Supplies	38	37
Total	$ 2,226	$ 1,735

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