Cash, Cash Equivalents and Investments - Gain (Loss) on Equity Investments (Details) $ in Millions	3 Months Ended
	Jan. 27, 2019 USD ($)
Gain (Loss) on Securities [Line Items]
Total gain on equity investments, net	$ 12
Publicly traded equity securities
Gain (Loss) on Securities [Line Items]
Unrealized gain	6
Unrealized loss	(2)
Gain on sales	1
Loss on sales	0
Equity investments in privately-held companies
Gain (Loss) on Securities [Line Items]
Unrealized gain	7
Unrealized loss	(1)
Gain on sales	1
Loss on sales	$ 0