Taxes on Earnings Schedule Of Provision Of Income Taxes On Earnings Of Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 01, 2021	Aug. 02, 2020	Jul. 28, 2019
Income Tax Disclosure [Abstract]
Current Federal Tax Expense (Benefit)	$ 151	$ 152	$ 104
Current State and Local Tax Expense (Benefit)	34	26	19
Current Foreign Tax Expense (Benefit)	6	3	5
Current Income Tax Expense (Benefit)	191	181	128
Deferred Federal Income Tax Expense (Benefit)	102	(12)	19
Deferred State and Local Income Tax Expense (Benefit)	33	4	7
Deferred Foreign Income Tax Expense (Benefit)	2	1	(3)
Deferred Income Tax Expense (Benefit)	137	(7)	23
Income Tax Expense (Benefit)	$ 328	$ 174	$ 151