Taxes on Earnings Schedule of Activity Related to Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 01, 2021	Aug. 02, 2020	Jul. 28, 2019
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits	$ 23	$ 24	$ 32
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	0	0	1
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(1)	(1)	(1)
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	3	2	2
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	0	(1)	(9)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	(3)	(1)	(1)
Unrecognized Tax Benefits	$ 22	$ 23	$ 24