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Warranty, Guarantees and Contingencies (Details Textual) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Apr. 26, 2015
Jun. 20, 2014
employee
Feb. 07, 2013
employee
Commitments and Contingencies Disclosure [Abstract]      
Standard product warranty period 12 months    
Maximum potential amount of future payments for letters of credit or other guarantee instruments $ 55us-gaap_GuaranteeObligationsMaximumExposure    
Parent guarantees to banks $ 102amat_GuarantorObligationsParentGuaranteesMadetoBanks    
Number of employees acquitted     9amat_NumberOfEmployeesAcquitted
Number of employees found guilty     1amat_NumberOfEmployeesFoundGuilty
Number of employees found not guilty   10amat_NumberofEmployeesFoundNotGuilty