Industry Segment Operations (Reportable Segment) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Oct. 25, 2015	Jul. 26, 2015	Apr. 26, 2015	Jan. 25, 2015	Oct. 26, 2014	Jul. 27, 2014	Apr. 27, 2014	Jan. 26, 2014	Oct. 25, 2015	Oct. 26, 2014	Oct. 27, 2013
Information for each reportable segment
Net Sales	$ 2,368	$ 2,490	$ 2,442	$ 2,359	$ 2,264	$ 2,265	$ 2,353	$ 2,190	$ 9,659	$ 9,072	$ 7,509
Operating Income (Loss)									1,693	1,520	432
Depreciation/ Amortization									371	375	410
Capital Expenditures									215	241	197
Segment Assets	15,308				13,174				15,308	13,174
Silicon Systems
Information for each reportable segment
Net Sales									6,135	5,978	4,775
Operating Income (Loss)									1,410	1,391	876
Depreciation/ Amortization									268	268	260
Capital Expenditures									115	134	118
Segment Assets	5,464				5,508				5,464	5,508	5,525
Applied Global Services
Information for each reportable segment
Net Sales									2,531	2,200	2,023
Operating Income (Loss)									664	573	436
Depreciation/ Amortization									10	11	13
Capital Expenditures									12	7	7
Segment Assets	2,254				2,042				2,254	2,042	1,958
Display
Information for each reportable segment
Net Sales									780	615	538
Operating Income (Loss)									156	129	74
Depreciation/ Amortization									5	5	8
Capital Expenditures									13	4	6
Segment Assets	456				423				456	423	293
Energy and Environmental Solutions
Information for each reportable segment
Net Sales									213	279	173
Operating Income (Loss)									(61)	15	(433)
Depreciation/ Amortization									7	9	22
Capital Expenditures									3	1	1
Segment Assets	118				173				118	173	183
Total Segment
Information for each reportable segment
Net Sales									9,659	9,072	7,509
Operating Income (Loss)									2,169	2,108	953
Depreciation/ Amortization									290	293	303
Capital Expenditures									143	146	132
Segment Assets	$ 8,292				$ 8,146				$ 8,292	$ 8,146	$ 7,959