Restructuring Charges - Activities Related to Restructuring Reserves (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 30, 2020	Oct. 25, 2019	Oct. 30, 2020	Oct. 25, 2019
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period			$ 1	$ 19
Net charges	$ 37	$ 0	42	21
Cash payments			(24)	(31)
Other			0	(4)
Balance at end of period	19	5	19	5
August 2020 Restructuring
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period			0
Net charges			37
Cash payments			(18)
Other			0
Balance at end of period	19		19
May 2020 Restructuring
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period			0
Net charges			5
Cash payments			(5)
Other			0
Balance at end of period	0		0
May 2019 Restructuring
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period			1	0
Net charges			0	21
Cash payments			(1)	(19)
Other			0	0
Balance at end of period	$ 0	2	$ 0	2
April 2019 Restructuring
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period				15
Net charges				0
Cash payments				(12)
Other				0
Balance at end of period		3		3
November 2016 Restructuring
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period				4
Net charges				0
Cash payments				0
Other				(4)
Balance at end of period		$ 0		$ 0