Accumulated Other Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions		12 Months Ended
		Aug. 02, 2020		Jul. 28, 2019	Jul. 29, 2018	Jul. 30, 2017
Beginning Balance		$ (198)
Other comprehensive income (loss), after tax		189		$ (89)	$ (64)
Ending Balance		(10)		(198)
Accumulated Other Comprehensive Income Foreign Currency Translation Tax (Benefit) Expense		0		4	6	$ 6
Accumulated Other Comprehensive Income Cashflow Hedges Tax (Benefit) Expense		(1)		(2)	(4)	(12)
Accumulated Other Comprehensive Income Unamortized Pension And Post Retirement Tax (Benefit) Expense		2		8	25	$ 30
Accumulated Translation Adjustment [Member]
Beginning Balance	[1]	(218)		(154)	(84)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		(2)		(68)	(70)
Other Comprehensive Income Reclassifications Current Period Net of Tax		210	[2]	2	0
Other comprehensive income (loss), after tax		208		(66)	(70)
Ending Balance	[1]	(10)		(218)	(154)
Accumulated Translation Adjustment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning Balance	[3]			2
Ending Balance	[3]				2
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Beginning Balance	[4]	(9)		(4)	(22)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		2		(2)	16
Other Comprehensive Income Reclassifications Current Period Net of Tax		0	[2]	0	2
Other comprehensive income (loss), after tax		2		(2)	18
Ending Balance	[4]	(7)		(9)	(4)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning Balance	[3]			(3)
Ending Balance	[3]				(3)
Accumulated Defined Benefit Plans Adjustment [Member]
Beginning Balance	[5]	29		40	53
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		0		0	7
Other Comprehensive Income Reclassifications Current Period Net of Tax		(22)	[2]	(21)	(20)
Other comprehensive income (loss), after tax		(22)		(21)	(13)
Ending Balance	[5]	7		29	40
Accumulated Defined Benefit Plans Adjustment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning Balance	[3]			10
Ending Balance	[3]				10
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance		(198)		(118)	(53)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax		0		(70)	(47)
Other Comprehensive Income Reclassifications Current Period Net of Tax		188	[2]	(19)	(18)
Other comprehensive income (loss), after tax		188		(89)	(65)
Ending Balance		$ (10)		(198)	(118)
Accumulated Other Comprehensive Income (Loss) [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning Balance	[3]			$ 9
Ending Balance	[3]				$ 9

[1] Included no tax as of August 2, 2020, a tax expense of $4 as of July 28, 2019, and $6 as of July 29, 2018, and July 31, 2017.

[2] Reflects the reclassification from sale of businesses. See Note 3 for additional information.

[3] Reflects the adoption of the FASB guidance on stranded tax effects. See Note 2 for additional information.

[4] Included a tax benefit of $1 as of August 2, 2020, $2 as of July 28, 2019, $4 as of July 29, 2018, and $12 as of July 31, 2017.

[5] Included a tax expense of $2 as of August 2, 2020, $8 as of July 28, 2019, $25 as of July 29, 2018, and $30 as of July 31, 2017.