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Inventories - Summary of Inventories (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Inventories [Line Items]    
Finished products $ 2,378 $ 2,504
Raw and packaging materials 1,231 1,183
Products in process 605 583
Materials in transit and payments on account 189 151
Total $ 4,403 $ 4,422