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Income Taxes (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Apr. 26, 2015
Apr. 27, 2014
Apr. 26, 2015
Apr. 27, 2014
Effective income tax rate provision 6.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations 28.20%us-gaap_EffectiveIncomeTaxRateContinuingOperations 13.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations 24.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Decrease to Provision for Income Taxes [Member]        
Amount misstated 39us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsAmount
/ us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis
= amat_DecreasetoProvisionforIncomeTaxesMember
  35us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsAmount
/ us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis
= amat_DecreasetoProvisionforIncomeTaxesMember