Stockholders' Equity - Accumulated Other Comprehensive Income (Loss) by Component Net of Tax (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 29, 2021	Jan. 24, 2020	Jan. 29, 2021	Jan. 24, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances	$ 370	$ 536	$ 242	$ 1,090
Other comprehensive income (loss), net of tax			(3)
Amounts reclassified from AOCI, net of tax			11
Other comprehensive income (loss)	(2)	(3)	8	4
Balances	478	282	478	282
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances			(42)
Other comprehensive income (loss), net of tax			10
Amounts reclassified from AOCI, net of tax			0
Other comprehensive income (loss)			10
Balances	(32)		(32)
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 (loss)			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			0
Amounts reclassified from AOCI, net of tax			0
Other comprehensive income (loss)			0
Balances	1		1
Unrealized Gains (Losses) on Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances			0
Other comprehensive income (loss), net of tax			(13)
Amounts reclassified from AOCI, net of tax			11
Other comprehensive income (loss)			(2)
Balances	(2)		(2)
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances	(32)	(36)	(42)	(43)
Other comprehensive income (loss)	(2)	(3)	8	4
Balances	$ (34)	$ (39)	$ (34)	$ (39)