v3.26.1
Earnings Per Share - Schedule of Reconciliation of Basic and Diluted of Earnings (loss) Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Numerator      
Net earnings (loss) attributable to Coherent Corp. $ 804,998 $ 49,364 $ (156,154)
Basic earnings (loss) available to common shareholders 769,896 (80,562) (279,511)
Effect of dilutive securities:      
Diluted earnings (loss) available to common shareholders $ 804,998 $ (80,562) $ (279,511)
Denominator      
Weighted average shares, basic (in shares) 177,269 154,755 151,642
Effect of dilutive securities:      
Common stock equivalents (in shares) 5,699 0 0
Series B Convertible Preferred Stock (in shares) 12,419 0 0
Diluted weighted average common shares (in shares) 195,387 154,755 151,642
Basic earnings (loss) per common share (in usd per share) $ 4.34 $ (0.52) $ (1.84)
Diluted earnings (loss) per common share (in usd per share) $ 4.12 $ (0.52) $ (1.84)
Common stock equivalents      
Numerator      
Deduct Series B dividends and deemed dividends $ (35,102) $ (129,926) $ (123,357)
Preferred Stock Dividends      
Effect of dilutive securities:      
Add back Series B preferred stock dividends 31,751 0 0
Deemed Dividends      
Effect of dilutive securities:      
Add back Series B preferred stock dividends $ 3,351 $ 0 $ 0