Consolidated Statements of Earnings (Loss) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues	$ 4,707,688	$ 5,160,100	$ 3,316,616
Costs, Expenses and Other Expense (Income)
Cost of goods sold	3,251,724	3,541,817	2,051,120
Internal research and development	478,788	499,603	377,106
Selling, general and administrative	854,001	1,036,699	474,096
Restructuring charges	27,054	119,101	0
Interest expense	288,475	286,872	121,254
Other (income) expense, net	(44,707)	31,566	11,233
Total Costs, Expenses and Other Expense	4,855,335	5,515,658	3,034,809
Earnings (loss) before income taxes	(147,647)	(355,558)	281,807
Income Tax Expense (Benefit)	11,117	(96,100)	47,048
Net Earnings (Loss)	(158,764)	(259,458)	234,759
Net Loss Attributable to Noncontrolling Interests	(2,610)	0	0
Net Earnings (Loss) Attributable to Coherent Corp.	(156,154)	(259,458)	234,759
Less: Dividends on Preferred Stock	123,357	144,212	68,225
Net Earnings (Loss) Available to the Common Shareholders	$ (279,511)	$ (403,670)	$ 166,534
Basic Earnings (Loss) Per Share (in usd per share)	$ (1.84)	$ (2.93)	$ 1.57
Diluted Earnings (Loss) Per Share (in usd per share)	$ (1.84)	$ (2.93)	$ 1.45