Restructuring and Other Charges (Schedule Of Activities Related To Restructuring And Other Charges) (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Aug. 31, 2014	Apr. 29, 2017	Apr. 30, 2016
Restructuring Reserve [Roll Forward]
Liability as of beginning period		$ 45	$ 89
Charges		614	255
Cash payments		(489)	(251)
Non-cash items		(64)	(21)
Liability as of ending period		106	72
FISCAL 2015 PLAN
Restructuring Reserve [Roll Forward]
Charges	$ 756
FISCAL 2015 PLAN | Employee Severance
Restructuring Reserve [Roll Forward]
Liability as of beginning period		21
Charges		0
Cash payments		(14)
Non-cash items		(4)
Liability as of ending period		3
FISCAL 2015 PLAN | Other
Restructuring Reserve [Roll Forward]
Liability as of beginning period		24
Charges		0
Cash payments		(5)
Non-cash items		(9)
Liability as of ending period		10
FISCAL 2017 PLAN | Employee Severance
Restructuring Reserve [Roll Forward]
Liability as of beginning period		0
Charges		510
Cash payments		(449)
Non-cash items		(3)
Liability as of ending period		58
FISCAL 2017 PLAN | Other
Restructuring Reserve [Roll Forward]
Liability as of beginning period		0
Charges		104
Cash payments		(21)
Non-cash items		(48)
Liability as of ending period		$ 35
FISCAL 2015 AND PRIOR PLANS | Employee Severance
Restructuring Reserve [Roll Forward]
Liability as of beginning period			60
Charges			224
Cash payments			(238)
Non-cash items			0
Liability as of ending period			46
FISCAL 2015 AND PRIOR PLANS | Other
Restructuring Reserve [Roll Forward]
Liability as of beginning period			29
Charges			31
Cash payments			(13)
Non-cash items			(21)
Liability as of ending period			$ 26