Accounts Receivable, Net (Net of Allowance for Doubtful Accounts) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 28, 2018
Changes in allowance for doubtful accounts
Beginning balance	$ 30	$ 33	$ 34
Provision	0	0	0
Deductions	0	(3)	(1)
Ending balance	$ 30	$ 30	$ 33