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Income Taxes - Income Before Provision For Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Jul. 31, 2021
Jul. 25, 2020
Jul. 27, 2019
Income Tax Disclosure [Abstract]      
United States $ 12,335 $ 7,534 $ 7,611
International 927 6,436 6,960
INCOME BEFORE PROVISION FOR INCOME TAXES $ 13,262 $ 13,970 $ 14,571