Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net Earnings (Loss)	$ 101,542	$ (28,475)	$ 126,403	$ (96,009)
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	(432,264)	226,788	(141,990)	118,885
Change in fair value of interest rate instruments, net of taxes	(1,426)	(27,329)	(20,181)	(24,391)
Pension adjustment, net of taxes	(429)	57	(584)	348
Comprehensive Income (Loss)	(332,577)	171,041	(36,352)	(1,167)
Comprehensive Loss Attributable to Noncontrolling Interests	(1,843)	(1,484)	(2,869)	(1,484)
Foreign Currency Translation Adjustments Attributable to Noncontrolling Interests	(950)	1,065	(399)	1,065
Comprehensive Income (Loss) Attributable to Coherent Corp.	$ (329,784)	$ 171,460	$ (33,084)	$ (748)