Basis of Presentation (Details) - USD ($) $ in Millions	9 Months Ended
	Jul. 26, 2020	Jul. 28, 2019	Oct. 28, 2019	Oct. 27, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset	$ 254			$ 0
Lease liability	$ 259
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member	us-gaap:AccountingStandardsUpdate201601Member
Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset			$ 160
Deferred rent			4
Lease liability			$ 164