Consideration Transferred to Acquire Novellus (Detail) (Novellus Systems Incorporated, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 24, 2012
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Lam common stock issued at merger	82,689
Per share price of Lam common stock as of June 4, 2012	$ 35.99
Estimated purchase price consideration	$ 3,026,988
Stock Option
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Estimated fair value of vested Lam stock	41,412	[1]
Common Stock
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Estimated fair value of vested Lam stock	2,975,977
Restricted Stock Units
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Estimated fair value of vested Lam stock	$ 9,599	[2]

[1] The fair value of the Lam Research equivalent stock options as of the acquisition date was estimated using the Black-Scholes valuation model. Assumptions used are the same as those for acquired awards as disclosed in Note 11 of Notes to Condensed Consolidated Financial Statements.

[2] The fair value of Lam Research equivalent restricted stock as of the acquisition date was estimated based upon the per share price of Lam Research common stock as of June 4, 2012, and giving effect to the exchange ratio of 1.125.