Supplemental Financial Information - Summary of Components of Deferred Revenue and Financed Unearned Services Revenue (Detail) - USD ($) $ in Millions	Jan. 28, 2022	Apr. 30, 2021
Contract With Customer Liability [Line Items]
Deferred revenue and financed unearned services revenue	$ 3,969	$ 4,003
Short-term	2,063	2,062
Long-term	1,906	1,941
Deferred product revenue
Contract With Customer Liability [Line Items]
Deferred revenue and financed unearned services revenue	49	59
Deferred services revenue
Contract With Customer Liability [Line Items]
Deferred revenue and financed unearned services revenue	3,857	3,873
Financed unearned services revenue
Contract With Customer Liability [Line Items]
Deferred revenue and financed unearned services revenue	$ 63	$ 71