Derivatives and Currency Exchange Risk Management - Derivative Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Recurring - USD ($) $ in Millions	Jan. 28, 2022	Apr. 30, 2021
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 326	$ 85
Derivative liabilities	162	296
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	18
Derivative liabilities	$ 15	$ 0