Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Oct. 25, 2015	Oct. 26, 2014	Oct. 27, 2013
Statement of Stockholders' Equity [Abstract]
Tax benefit (detriment) included in issuance under stock plans	$ 55	$ 27	$ 14

Tax benefits (detriment) included in issuance under stock plans.

No definition available.

Name:	amat_TaxBenefitsDetrimentIncludedInIssuanceUnderStockPlans
Namespace Prefix:	amat_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration