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Borrowing Facilities and Long-Term Debt (Narrative) (Details) (USD $)
Oct. 26, 2014
Oct. 27, 2013
Oct. 30, 2011
Line of Credit Facility [Line Items]      
Available revolving credit agreement $ 1,600,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity    
Amount outstanding 0us-gaap_LineOfCreditFacilityAmountOutstanding 0us-gaap_LineOfCreditFacilityAmountOutstanding  
Commercial paper program amount     1,500,000,000amat_CommercialPaperProgramAmount
Revolving Credit [Member]      
Line of Credit Facility [Line Items]      
Available revolving credit agreement 1,500,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember		    
Foreign Line of Credit [Member]      
Line of Credit Facility [Line Items]      
Available revolving credit agreement 75,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_ForeignLineOfCreditMember		    
Commercial Paper [Member]      
Line of Credit Facility [Line Items]      
Outstanding debt $ 0us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_CommercialPaperMember		 $ 0us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_CommercialPaperMember