Cash, Cash Equivalents and Investments - Narrative (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Jul. 28, 2019	Jul. 29, 2018	Jul. 28, 2019	Jul. 29, 2018
Schedule of Cash, Cash Equivalents and Investments [Line Items]
Gain on sale of investments		$ 13,000,000		$ 14,000,000
Fixed Income Securities
Schedule of Cash, Cash Equivalents and Investments [Line Items]
Other than temporary impairment losses, investments	$ 0	$ 0	$ 0	$ 0