Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Net earnings (loss)	$ (158,764)	$ (259,458)	$ 234,759
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	(81,889)	87,927	(89,967)
Pension adjustment, net of taxes	(7,443)	(6,105)	15,719
Other comprehensive income (loss)	(109,528)	111,893	(16,434)
Comprehensive Income (Loss)	(268,292)	(147,565)	218,325
Comprehensive Loss Attributable to Noncontrolling Interests	(2,610)	0	0
Foreign Currency Translation Adjustments Attributable to Noncontrolling Interests	429	0	0
Comprehensive Income (Loss) Attributable to Coherent Corp.	(266,111)	(147,565)	218,325
Interest Rate Swap
Other Comprehensive Income (Loss):
Change in fair value of interest rate swap and interest rate cap, net of taxes	(22,885)	7,749	43,508
Interest Rate Cap
Other Comprehensive Income (Loss):
Change in fair value of interest rate swap and interest rate cap, net of taxes	$ 2,689	$ 22,322	$ 14,306