KLA Corporation Quarterly report [Sections 13 or 15(d)]

EQUITY AND LONG-TERM INCENTIVE COMPENSATION PLANS - Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025	Jun. 30, 2025
Stock-based compensation expense
Total SBC expense	$ 83,938	$ 70,201	$ 228,067	$ 193,742
Stock-based compensation capitalized as inventory	32,500		32,500		$ 26,300
Costs of revenues
Stock-based compensation expense
Total SBC expense	16,832	12,875	42,328	33,133
R&D
Stock-based compensation expense
Total SBC expense	26,370	20,726	69,326	55,151
SG&A
Stock-based compensation expense
Total SBC expense	$ 40,736	$ 36,600	$ 116,413	$ 105,458