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Inventories - Summary of Inventories (Detail) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Inventories [Line Items]    
Finished products $ 2,089 $ 2,378
Raw and packaging materials 1,285 1,231
Products in process 631 605
Materials in transit and payments on account 161 189
Total $ 4,167 $ 4,403