Cover Page - USD ($)	12 Months Ended
	Oct. 27, 2019	Dec. 06, 2019	Apr. 28, 2019
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Oct. 27, 2019
Document Transition Report	false
Entity File Number	000-06920
Entity Registrant Name	APPLIED MATERIALS INC /DE
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-1655526
Entity Address, Address Line One	3050 Bowers Avenue
Entity Address, Address Line Two	P.O. Box 58039
Entity Address, City or Town	Santa Clara
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95052-8039
City Area Code	408
Local Phone Number	727-5555
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	AMAT
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 41,677,858,958
Entity Common Stock, Shares Outstanding		915,304,098
Documents Incorporated by Reference	Portions of Part III will be provided in accordance with Instruction G(3) to Form 10-K no later than February 24, 2020.
Entity Central Index Key	0000006951
Current Fiscal Year End Date	--10-27
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false