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Industry Segment Operations (Percentage of New Sales) (Details)
3 Months Ended
Jan. 25, 2015
Samsung Electronics Co., Ltd. [Member]  
Entity-Wide Revenue, Major Customer [Line Items]  
Entity-Wide Revenue, Major Customer, Percentage 23.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorCustomersAxis
= amat_CustomerOneMember
Taiwan Semiconductor Manufacturing Company Limited [Member]  
Entity-Wide Revenue, Major Customer [Line Items]  
Entity-Wide Revenue, Major Customer, Percentage 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorCustomersAxis
= amat_CustomerTwoMember