Goodwill And Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 31, 2021	Nov. 01, 2020
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 11	$ 10
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	41
Finite-Lived Intangible Assets, Amortization Expense, Year Two	41
Finite Lived Intangible Assets, Amortization Expense, Year Three	41
Finite Lived Intangible Assets, Amortization Expense, Year Four	41
Finite Lived Intangible Assets, Amortization Expense, Year Five	$ 41
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	17 years