Taxes on Earnings Schedule Of Provision Of Income Taxes On Earnings Of Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 02, 2020	Jul. 28, 2019	Jul. 29, 2018
Income Tax Disclosure [Abstract]
Current Federal Tax Expense (Benefit)	$ 152	$ 104	$ 93
Current State and Local Tax Expense (Benefit)	26	19	26
Current Foreign Tax Expense (Benefit)	3	5	11
Current Income Tax Expense (Benefit)	181	128	130
Deferred Federal Income Tax Expense (Benefit)	(12)	19	(26)
Deferred State and Local Income Tax Expense (Benefit)	4	7	14
Deferred Foreign Income Tax Expense (Benefit)	1	(3)	(12)
Deferred Income Tax Expense (Benefit)	(7)	23	(24)
Income Tax Expense (Benefit)	$ 174	$ 151	$ 106