STOCK REPURCHASE PROGRAM - Additional Information (Details) $ / shares in Units, shares in Thousands			1 Months Ended		3 Months Ended
	Mar. 11, 2026 USD ($) shares	Apr. 30, 2025 USD ($) financial_institution shares	Sep. 30, 2025 $ / shares shares	May 31, 2024 USD ($)	Mar. 29, 2026 $ / shares shares	Dec. 28, 2025 $ / shares shares	Sep. 28, 2025 $ / shares shares
Stock repurchase program
Equity, Class of Treasury Stock [Line Items]
Increase in authorized amount \| $				$ 10,000,000,000.00
Total number of shares repurchased (in shares) \| shares					3,516	9,387	9,686
Weighted-average share price (in dollars per share) \| $ / shares					$ 210.57	$ 153.62	$ 105.67
April 2025 Accelerated Share Repurchase Agreement
Equity, Class of Treasury Stock [Line Items]
Share repurchase total \| $	$ 200,000,000.0	$ 500,000,000.0
Total number of shares repurchased (in shares) \| shares	685	5,200	317
Accelerated share repurchases of closing stock price	75.00%	75.00%
Number of financial institutions \| financial_institution		2
Weighted-average share price (in dollars per share) \| $ / shares			$ 91.00

LAM RESEARCH CORP 10-Q