Special Charges (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended			9 Months Ended	12 Months Ended					36 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended
	Aug. 04, 2012	Jul. 30, 2011	Aug. 04, 2012	Jul. 30, 2011	Aug. 04, 2012 Reduction of Operating Costs [Member]	May 05, 2012 Reduction of Operating Costs [Member]	Feb. 04, 2012 Reduction of Operating Costs [Member]	Aug. 04, 2012 Reduction of Operating Costs [Member]	Oct. 29, 2011 Reduction of Operating Costs [Member]	Oct. 30, 2010 Reduction of Operating Costs [Member]	Oct. 31, 2009 Reduction of Operating Costs [Member]	Nov. 01, 2008 Reduction of Operating Costs [Member]	Nov. 01, 2008 Reduction of Operating Costs 2008-2010 [Member] Person	Oct. 30, 2010 Reduction of Operating Costs 2008-2010 [Member]	Aug. 04, 2012 Reduction of Operating Costs 2011 [Member] Person	Oct. 29, 2011 Reduction of Operating Costs 2011 [Member]	Aug. 04, 2012 Reduction of Operating Costs 2012 [Member] Person	Feb. 04, 2012 Reduction of Operating Costs 2012 [Member] Person
Summary of the Company's special charges, Income Statement
Workforce reductions								$ 7,966,000	$ 2,239,000	$ 10,908,000	$ 26,583,000	$ 1,627,000
Facility closure costs								186,000	0	0	2,411,000	0
Non-cash impairment charge								219,000	0	487,000	839,000	0
Other items								60,000	0	24,000	500,000	0
Total Charges	5,836,000	0	8,431,000	0				8,431,000	2,239,000	11,419,000	30,333,000	1,627,000		43,300,000		2,239,000	5,800,000	2,600,000
Summary of the Company's special charges and accruals related to ongoing actions, Balance Sheet
Accrued Restructuring, Beginning Balance					2,352,000	5,112,000	3,876,000	3,876,000
Fiscal 2012 special charge					5,836,000		2,595,000
Severance payments					(3,043,000)	(2,760,000)	(1,359,000)
Facility closure costs					(128,000)
Non-cash impairment charge			219,000	0	(219,000)
Effect of foreign currency on accrual					3,000
Accrued Restructuring, Ending Balance					4,801,000	2,352,000	5,112,000	4,801,000	3,876,000
Special Charges (Textual) [Abstract]
Charge related to lease obligation costs for facilities ceased using by Company														2,100,000			200,000
Write-off of property, plant and equipment no longer used														800,000			200,000
Contract termination costs														500,000				100,000
Clean-up and closure costs that were expensed as incurred														300,000
Number of manufacturing employees													245
Total Charges	5,836,000	0	8,431,000	0				8,431,000	2,239,000	11,419,000	30,333,000	1,627,000		43,300,000		2,239,000	5,800,000	2,600,000
Charge related to the severance and fringe benefit costs														39,100,000			5,400,000	2,500,000
Impairment of intellectual property, related to the Company's decision to abandon efforts to develop a particular expertise in power management														$ 500,000
Number of engineering and selling, marketing, general and administrative (SMGA) employees													470		25		61	34
Employees planned to be separated who are still employed															2		25