OTHER INCOME (EXPENSE), NET - Schedule of Other Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Other Income and Expenses [Abstract]
Foreign exchange gains (losses)	$ (6,752)	$ 25,539	$ (19,907)	$ 14,160
Unrealized gains (losses) on derivatives not designated as hedges	2,906	45,549	10,749	20,614
OpenText share in net income of equity investees	5,216	1,538	7,633	1,993
Adjustment to gain on AMC Divestiture	0	(4,175)	0	(4,175)
Other miscellaneous income (expense)	1,562	164	1,481	368
Total other income (expense), net	$ 2,932	$ 68,615	$ (44)	$ 32,960