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Stockholders' Equity, Comprehensive Income and Share-Based Compensation (Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units) (Details) (Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units [Member], USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Jan. 25, 2015
Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units [Member]
 
Restricted stock units, restricted stock, performance shares and performance units  
Beginning Balance (in shares) 33us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= amat_RestrictedStockUnitsRestrictedStockPerformanceSharesandPerformanceUnitsMember
Granted (in shares) 9us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= amat_RestrictedStockUnitsRestrictedStockPerformanceSharesandPerformanceUnitsMember
Vested (in shares) (12)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= amat_RestrictedStockUnitsRestrictedStockPerformanceSharesandPerformanceUnitsMember
Canceled (in shares) 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= amat_RestrictedStockUnitsRestrictedStockPerformanceSharesandPerformanceUnitsMember
Ending Balance (in shares) 30us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= amat_RestrictedStockUnitsRestrictedStockPerformanceSharesandPerformanceUnitsMember
Weighted Average Grant Date Fair Value  
Beginning of Period (in dollars per share) $ 12.59us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= amat_RestrictedStockUnitsRestrictedStockPerformanceSharesandPerformanceUnitsMember
Granted (in dollars per share) $ 23.58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= amat_RestrictedStockUnitsRestrictedStockPerformanceSharesandPerformanceUnitsMember
Vested (in dollars per share) $ 11.71us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= amat_RestrictedStockUnitsRestrictedStockPerformanceSharesandPerformanceUnitsMember
Canceled (in dollars per share) $ 13.80us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= amat_RestrictedStockUnitsRestrictedStockPerformanceSharesandPerformanceUnitsMember
Ending Balance (in dollars per share) $ 16.31us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= amat_RestrictedStockUnitsRestrictedStockPerformanceSharesandPerformanceUnitsMember