Stockholders' Equity - Accumulated Other Comprehensive Income (Loss) by Component Net of Tax (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 30, 2020	Oct. 25, 2019	Oct. 30, 2020	Oct. 25, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances	$ 284	$ 863	$ 242	$ 1,090
Other comprehensive income (loss), net of tax			2
Amounts reclassified from AOCI, net of tax			8
Other comprehensive income	7	3	10	7
Balances	370	536	370	536
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances			(42)
Other comprehensive income (loss), net of tax			9
Amounts reclassified from AOCI, net of tax			0
Other comprehensive income			9
Balances	(33)		(33)
Defined Benefit Obligation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances			(1)
Other comprehensive income (loss), net of tax			0
Amounts reclassified from AOCI, net of tax			0
Other comprehensive income			0
Balances	(1)		(1)
Unrealized Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances			1
Other comprehensive income (loss), net of tax			1
Amounts reclassified from AOCI, net of tax			0
Other comprehensive income			1
Balances	2		2
Unrealized Gains (Losses) on Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances			0
Other comprehensive income (loss), net of tax			(8)
Amounts reclassified from AOCI, net of tax			8
Other comprehensive income			0
Balances	0		0
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances	(39)	(39)	(42)	(43)
Other comprehensive income	7	3	10	7
Balances	$ (32)	$ (36)	$ (32)	$ (36)