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