Cash and Cash Equivalents (Gain (Loss) on Equity Investments) (Details) $ in Millions	12 Months Ended
	Oct. 27, 2019 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Total gain on equity investments, net	$ 36
Publicly traded equity securities
Debt and Equity Securities, FV-NI [Line Items]
Unrealized gain	28
Unrealized loss	(5)
Gain on sales	2
Loss on sales or impairment	0
Equity investments in privately-held companies
Debt and Equity Securities, FV-NI [Line Items]
Unrealized gain	13
Unrealized loss	(6)
Gain on sales	5
Loss on sales or impairment	$ (1)