Schedule of Accrued Expenses and Other Current Liabilities [Table Text Block]

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

Name:	us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration