Goodwill, Purchased Technology and Other Intangible Assets (Amortization Expense by Segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 26, 2015	Jul. 27, 2014	Jul. 26, 2015	Jul. 27, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 46	$ 45	$ 138	$ 136
Silicon Systems Group [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	45	42	132	126
Applied Global Services [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	0	0	1	3
Display [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	0	1	2	2
Energy And Environmental Solutions [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1	$ 2	$ 3	$ 5