Taxes on Earnings Schedule of Activity Related to Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 02, 2020	Jul. 28, 2019	Jul. 29, 2018
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits	$ 24	$ 32	$ 64
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	0	1	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(1)	(1)	(37)
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	2	2	2
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	(1)	(9)	(1)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	(1)	(1)	0
Unrecognized Tax Benefits, Increase Resulting from Acquisition	0	0	4
Unrecognized Tax Benefits	$ 23	$ 24	$ 32