Recent Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Millions	Aug. 01, 2021	Aug. 02, 2020	Jul. 29, 2019	Jul. 28, 2019	Jul. 29, 2018
Earnings retained in the business	$ 3,742	$ 3,190
Accrued liabilities	576	693
Payable to suppliers and others	1,070	1,049
Deferred Tax Liabilities, Net	(1,050)	(913)
Other assets	449	283
Operating Lease, Right-of-Use Asset	235	254
Operating Lease, Liability	234
Plant assets, net of depreciation	2,370	2,368		$ 2,455
Accumulated other comprehensive income (loss)	$ 5	$ (10)
Accounting Standards Update 2014-09 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Earnings retained in the business					$ (8)
Accrued liabilities					10
Payable to suppliers and others					1
Deferred Tax Liabilities, Net					2
Other assets					$ 1
Accounting Standards Update 2016-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Operating Lease, Right-of-Use Asset			$ 259
Operating Lease, Liability			254
Plant assets, net of depreciation			(20)
Build-to-suit Lease Commitment Liability Derecognized			$ 20
Accounting Standards Update 2018-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Earnings retained in the business				(9)
Accumulated other comprehensive income (loss)				$ 9