Cash, Cash Equivalents and Investments - Gain (Loss) on Equity Investments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Apr. 28, 2019	Apr. 28, 2019
Gain (Loss) on Securities [Line Items]
Total gain on equity investments, net	$ 10	$ 22
Publicly traded equity securities
Gain (Loss) on Securities [Line Items]
Unrealized gain	7	13
Unrealized loss	(1)	(3)
Gain on sales	1	2
Equity investments in privately-held companies
Gain (Loss) on Securities [Line Items]
Unrealized gain	2	9
Unrealized loss	(2)	(3)
Gain on sales	$ 3	$ 4