Cash, Cash Equivalents and Investments - Gain (Loss) on Equity Investments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 26, 2020	Jul. 28, 2019	Jul. 26, 2020	Jul. 28, 2019
Gain (Loss) on Securities [Line Items]
Total gain (loss) on equity investments, net	$ 13	$ 8	$ 2	$ 31
Publicly traded equity securities
Gain (Loss) on Securities [Line Items]
Unrealized gain	6	10	11	23
Unrealized loss	0	(1)	(15)	(4)
Realized gain on sales	1	0	1	2
Equity investments in privately-held companies
Gain (Loss) on Securities [Line Items]
Unrealized gain	1	2	10	11
Unrealized loss	(2)	(2)	(5)	(5)
Realized gain on sales	7	0	8	5
Realized loss on sales or impairment	$ 0	$ (1)	$ (8)	$ (1)