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Special Charges (Details) (USD $)
3 Months Ended12 Months Ended12 Months Ended3 Months Ended12 Months Ended
Oct. 29, 2011
Jul. 30, 2011
Apr. 30, 2011
Jan. 29, 2011
Oct. 30, 2010
Jul. 31, 2010
May 01, 2010
Jan. 30, 2010
Oct. 29, 2011
Year
Segments
Person
Installment
Oct. 30, 2010
Oct. 31, 2009
Nov. 01, 2008
Oct. 30, 2010
Closure of Wafer Fabrication Facility in Sunnyvale [Member]
Oct. 31, 2009
Closure of Wafer Fabrication Facility in Sunnyvale [Member]
Oct. 29, 2011
Closure of Wafer Fabrication Facility in Sunnyvale [Member]
Oct. 30, 2010
Consolidation of a Wafer Fabrication Facility in Limerick [Member]
Oct. 31, 2009
Consolidation of a Wafer Fabrication Facility in Limerick [Member]
Nov. 01, 2008
Consolidation of a Wafer Fabrication Facility in Limerick [Member]
Nov. 03, 2007
Consolidation of a Wafer Fabrication Facility in Limerick [Member]
Person
Oct. 29, 2011
Consolidation of a Wafer Fabrication Facility in Limerick [Member]
Jan. 31, 2009
Reduction of Operating Costs [Member]
Oct. 29, 2011
Reduction of Operating Costs [Member]
Person
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, Severance and fringe benefit costs, foreign locations for 245 manufacturing employees and 470 engineering and SMG&A employees [Member]
Person
Oct. 29, 2011
Closure of a Wafer Fabrication Facility in Cambridge [Member]
Oct. 30, 2010
Closure of a Wafer Fabrication Facility in Cambridge [Member]
Oct. 31, 2009
Closure of a Wafer Fabrication Facility in Cambridge [Member]
Person
Summary of the Company's special charges, Income Statement                             
Workforce reductions        $ 2,239,000$ 10,908,000$ 34,029,000$ 1,627,000         $ 2,239,000$ 10,908,000$ 26,583,000$ 1,627,000   $ 7,446,000
Change in estimate           1,461,000     1,461,000           
Facility closure costs         5,064,0003,659,000 375,000   1,191,000      2,411,000   4,689,00057,000
Non-cash impairment charge         487,00015,468,000           487,000839,000    14,629,000
Other items         24,000500,000           24,000500,000     
Total Fiscal Charges2,239,00000000016,483,0002,239,00016,483,00053,656,0003,088,000375,000   1,191,0001,461,00016,400,000  2,239,00011,419,00030,333,0001,627,000  4,689,00022,132,000
Accrued Restructuring                             
Accrued Restructuring, Beginning Balance   7,509,000   15,332,0007,509,00015,332,00015,002,000 169,0001,747,0000312,00011,754,000  01,501,0005,546,0008,161,0001,501,000  1,963,0006,690,0000
Severance payments        (5,265,000)(17,862,000)(33,714,000)    (302,000)(11,802,000)    (3,913,000)(12,223,000)(21,156,000)  (1,352,000)(5,337,000)(756,000)
Facility closure costs        (611,000)(5,839,000)(3,994,000) (544,000)(1,578,000)  (1,164,000)     (1,216,000)(1,195,000)  (611,000)(4,079,000)(57,000)
Non-cash impairment charge         (487,000)(15,468,000)           (487,000)(839,000)    (14,629,000)
Other payments         (24,000)(503,000)           (24,000)(503,000)     
Effect of foreign currency on accrual        4,000(94,000)353,000    (10,000)333,000    4,000(84,000)20,000     
Accrued Restructuring, Ending Balance3,876,000   7,509,000   3,876,0007,509,00015,332,00015,002,0000169,00000312,00011,754,000 0 3,876,0005,546,0008,161,0001,501,000 01,963,0006,690,000
Special charges2,239,00000000016,483,0002,239,00016,483,00053,656,0003,088,000375,000   1,191,0001,461,00016,400,000  2,239,00011,419,00030,333,0001,627,000  4,689,00022,132,000
Charge related to the severance and fringe benefit costs                  14,900,000      39,100,000  7,400,000
Charge related to lease obligation costs for facilities ceased using by Company            400,000       2,100,000       3,400,000
Number of manufacturing employees        0         150      245  124
Clean-up and closure costs that were expensed as incurred                  1,500,000     300,000   1,400,000
Write-off of property, plant and equipment no longer used                        800,000    
Number of engineering and SMGA (selling, marketing, general and administrative) employees        25            25   470  9
Contract termination costs                        500,000    
Number of employees separated during period                     25       
Number of employees still employed who are planned to be separated                     13       
Special Charges (Textuals) [Abstract]                             
Impairment of intellectual property, related to the Company's decision to abandon efforts to develop a particular expertise in power management           500,000                 
Impairment charge of manufacturing assets          $ 14,600,000