This element may be used to capture the disclosure pertaining to the entity's treasury stock repurchases, including number of shares purchased, total cost of repurchase, average cost per share, and remaining amount available for repurchase under Board of Director authorized plan.

Name:	lrcx_ScheduleOfRepurchasesUnderRepurchaseProgramTableTextBlock
Namespace Prefix:	lrcx
Data Type:	us-types:textBlockItemType
Balance Type:	na
Period Type:	duration

Stock Repurchase Program [Abstract]

Name:	lrcx_StockRepurchaseProgramAbstract
Namespace Prefix:	lrcx
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration