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Revenue - Summary of Activity Related to the Balances in Consolidated Balance Sheets (Detail) - USD ($)
$ in Millions
Apr. 24, 2020
Apr. 26, 2019
Apr. 27, 2018
Deferred Revenue Disclosure [Abstract]      
Other current assets $ 67 $ 75  
Other non-current assets 89 97  
Total deferred commissions $ 156 $ 172 $ 137