Condensed Consolidated Statements of Earnings (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Revenues	$ 1,208,809	$ 1,240,194	$ 3,393,326	$ 3,955,049
Costs, Expenses, and Other Expense (Income)
Cost of goods sold	842,322	820,038	2,369,303	2,680,131
Internal research and development	127,485	126,382	352,136	376,257
Selling, general and administrative	205,167	226,386	626,027	780,551
Restructuring charges	11,530	0	12,978	0
Interest expense	72,753	75,183	220,689	207,976
Other income, net	(18,597)	(3,048)	(30,252)	32,253
Total Costs, Expenses, & Other Expense	1,240,660	1,244,941	3,550,881	4,077,168
Loss Before Income Taxes	(31,851)	(4,747)	(157,555)	(122,119)
Income Tax Benefit	(16,121)	(7,293)	(45,816)	(40,895)
Net Earnings (Loss)	(15,730)	2,546	(111,739)	(81,224)
Net Loss Attributable to Noncontrolling Interests	(2,543)	0	(4,027)	0
Net Earnings (Loss) Attributable to Coherent Corp.	(13,187)	2,546	(107,712)	(81,224)
Less: Dividends on Preferred Stock	31,193	36,071	91,946	107,537
Net Loss Available to the Common Shareholders	$ (44,380)	$ (33,525)	$ (199,658)	$ (188,761)
Basic Loss Per Share (in usd per share)	$ (0.29)	$ (0.24)	$ (1.32)	$ (1.38)
Diluted Loss Per Share (in usd per share)	$ (0.29)	$ (0.24)	$ (1.32)	$ (1.38)