Goodwill, Purchased Technology and Other Intangible Assets (Amortization Expense by Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2016	Jan. 25, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 48	$ 46
Silicon Systems [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	47	43
Applied Global Services [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	0	1
Display [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	0	1
Energy And Environmental Solutions [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1	$ 1