Recent Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 02, 2020	Jul. 28, 2019	Jul. 29, 2018	Jul. 29, 2019
Earnings retained in the business	$ 3,190	$ 1,993
Accrued liabilities	693	609
Payable to suppliers and others	1,049	814
Deferred Tax Liabilities, Net	(913)	(925)
Other assets	283	127
Operating Lease, Right-of-Use Asset	254	0
Operating Lease, Liability	251
Short-term borrowings	1,202	1,371
Plant assets, net of depreciation	2,368	2,455	$ 2,466
Accumulated other comprehensive loss	(10)	(198)
Short-term borrowings	$ 0	20	0
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 loss		$ 9