KLA Corporation Annual report [Section 13 and 15(d), not S-K Item 405]

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Notional Amounts (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Jun. 30, 2025
Derivative [Line Items]
Remaining maturity	11 months	14 months
Derivatives designated as hedging instruments \| Purchase \| Other foreign currency hedge contracts
Derivative [Line Items]
Derivative, notional amount	$ 978,174	$ 618,844
Derivatives designated as hedging instruments \| Purchase \| Cash Flow Hedging \| Foreign exchange contracts
Derivative [Line Items]
Derivative, notional amount	533,193	405,349
Derivatives designated as hedging instruments \| Sell \| Other foreign currency hedge contracts
Derivative [Line Items]
Derivative, notional amount	608,933	429,643
Derivatives designated as hedging instruments \| Sell \| Cash Flow Hedging \| Foreign exchange contracts
Derivative [Line Items]
Derivative, notional amount	61,209	159,475
Derivatives designated as hedging instruments \| Sell \| Net Investment Hedging \| Foreign exchange contracts
Derivative [Line Items]
Derivative, notional amount	$ 343,791	$ 384,130