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Inventories (Detail) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Inventory Disclosure [Abstract]    
Raw materials $ 6,180 $ 5,743
Work in process and other 3,537 3,192
Finished manufactured goods 5,031 4,530
Goods acquired for resale 7,824 7,489
Total inventory $ 22,572 $ 20,954