KLA Corporation Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Location and Amounts of Designated and Non-designated Derivative's Gains and Losses (Details)

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Location and Amounts of Designated and Non-designated Derivative's Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments
Revenues	$ 1,459,593	$ 1,423,964	$ 1,509,453	$ 1,413,414	$ 1,258,435	$ 1,097,311	$ 1,119,898	$ 1,093,260	$ 5,806,424	$ 4,568,904	$ 4,036,701
Costs of Revenues and Operating Expense									2,449,561	1,869,377	1,446,041
Interest Expense									160,274	124,604	114,376
Amount of gains (losses) reclassified from accumulated OCI to earnings									2,072	4,018	$ 3,846
Rate lock contracts \| Revenues
Derivative Instruments
Amount of gains (losses) reclassified from accumulated OCI to earnings									0	0
Amount of gains (losses) reclassified from accumulated OCI to earnings as a result that a forecasted transaction is no longer probable of occurring									0	0
Rate lock contracts \| Costs of Revenues
Derivative Instruments
Amount of gains (losses) reclassified from accumulated OCI to earnings									0	0
Amount of gains (losses) reclassified from accumulated OCI to earnings as a result that a forecasted transaction is no longer probable of occurring									0	0
Rate lock contracts \| Interest Expense
Derivative Instruments
Amount of gains (losses) reclassified from accumulated OCI to earnings									(637)	424
Amount of gains (losses) reclassified from accumulated OCI to earnings as a result that a forecasted transaction is no longer probable of occurring									0	0
Rate lock contracts \| Other Expense (Income), Net
Derivative Instruments
Amount of gains (losses) reclassified from accumulated OCI to earnings									0	0
Amount of gains (losses) reclassified from accumulated OCI to earnings as a result that a forecasted transaction is no longer probable of occurring									0	4
Foreign exchange contracts \| Revenues
Derivative Instruments
Amount of gains (losses) reclassified from accumulated OCI to earnings									4,473	4,329
Amount excluded from the assessment of effectiveness recognized in earnings based on an amortization approach									(387)	0
Amount excluded from the assessment of effectiveness									0	0
Amount of gains (losses) recognized in earnings									0	0
Foreign exchange contracts \| Costs of Revenues
Derivative Instruments
Amount of gains (losses) reclassified from accumulated OCI to earnings									(1,377)	(739)
Amount excluded from the assessment of effectiveness recognized in earnings based on an amortization approach									0	0
Amount excluded from the assessment of effectiveness									0	0
Amount of gains (losses) recognized in earnings									0	0
Foreign exchange contracts \| Interest Expense
Derivative Instruments
Amount of gains (losses) reclassified from accumulated OCI to earnings									0	0
Amount excluded from the assessment of effectiveness recognized in earnings based on an amortization approach									0	0
Amount excluded from the assessment of effectiveness									0	0
Amount of gains (losses) recognized in earnings									0	0
Foreign exchange contracts \| Other Expense (Income), Net
Derivative Instruments
Amount of gains (losses) reclassified from accumulated OCI to earnings									0	0
Amount excluded from the assessment of effectiveness recognized in earnings based on an amortization approach									0	0
Amount excluded from the assessment of effectiveness									0	(323)
Amount of gains (losses) recognized in earnings									$ 1,990	$ (23)