Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net Earnings (Loss)	$ 1,765	$ (15,730)	$ 128,168	$ (111,739)
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	155,553	(146,770)	13,563	(27,885)
Change in fair value of interest rate instruments, net of taxes	(7,476)	6,978	(27,657)	(17,413)
Pension adjustment, net of taxes	795	476	211	824
Comprehensive Income (Loss)	150,637	(155,046)	114,285	(156,213)
Comprehensive Loss Attributable to Noncontrolling Interests	(13,946)	(2,543)	(16,815)	(4,027)
Foreign Currency Translation Adjustments Attributable to Noncontrolling Interests	429	(294)	30	771
Comprehensive Income (Loss) Attributable to Coherent Corp.	$ 164,154	$ (152,209)	$ 131,070	$ (152,957)