Industry Segment Operations (Details Textuals) (USD $) In Millions, unless otherwise specified	3 Months Ended
Jan. 27, 2013 Segment	Jan. 29, 2012
Industry Segment Operations (Textuals) [Abstract]
Number of reportable segments	4
Business acquisition costs not allocated to segments		$ 36

Business acquisition costs not allocated to a segment.

No definition available.

Name:	amat_BusinessAcquisitionCostsNotAllocatedToSegments
Namespace Prefix:	amat_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration