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Restructuring and Other Charges - Schedule of Activities Related to Restructuring and Other Charges (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	May 01, 2021	May 01, 2021	Apr. 25, 2020
Restructuring Reserve [Roll Forward]
Liability as of beginning period		$ 72	$ 33
Charges		878	354
Cash payments		(868)	(260)
Non-cash items		(32)	(29)
Liability as of ending period	$ 50	50	98
FISCAL 2020 AND PRIOR PLANS \| Employee Severance
Restructuring Reserve [Roll Forward]
Liability as of beginning period		58
Charges		0
Cash payments		(58)
Non-cash items		0
Liability as of ending period	0	0
FISCAL 2020 AND PRIOR PLANS \| Other
Restructuring Reserve [Roll Forward]
Liability as of beginning period		14
Charges		9
Cash payments		(5)
Non-cash items		(1)
Liability as of ending period	17	17
FISCAL 2021 PLAN
Restructuring Reserve [Roll Forward]
Charges	35	869
FISCAL 2021 PLAN \| Employee Severance
Restructuring Reserve [Roll Forward]
Liability as of beginning period		0
Charges		828
Cash payments		(801)
Non-cash items		0
Liability as of ending period	27	27
FISCAL 2021 PLAN \| Other
Restructuring Reserve [Roll Forward]
Liability as of beginning period		0
Charges		41
Cash payments		(4)
Non-cash items		(31)
Liability as of ending period	$ 6	$ 6
FISCAL 2018 AND PRIOR PLANS \| Employee Severance
Restructuring Reserve [Roll Forward]
Liability as of beginning period			22
Charges			209
Cash payments			(217)
Non-cash items			0
Liability as of ending period			14
FISCAL 2018 AND PRIOR PLANS \| Other
Restructuring Reserve [Roll Forward]
Liability as of beginning period			11
Charges			17
Cash payments			(2)
Non-cash items			(23)
Liability as of ending period			3
FISCAL 2020 PLAN \| Employee Severance
Restructuring Reserve [Roll Forward]
Liability as of beginning period			0
Charges			116
Cash payments			(35)
Non-cash items			0
Liability as of ending period			81
FISCAL 2020 PLAN \| Other
Restructuring Reserve [Roll Forward]
Liability as of beginning period			0
Charges			12
Cash payments			(6)
Non-cash items			(6)
Liability as of ending period			$ 0