EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Basic earnings per share
Net income attributable to OpenText	$ 150,379	$ 397,090	$ 310,672
Basic earnings per share attributable to OpenText (in dollars per share)	$ 0.56	$ 1.46	$ 1.14
Diluted earnings per share
Net income attributable to OpenText	$ 150,379	$ 397,090	$ 310,672
Diluted earnings per share attributable to OpenText (in dollars per share)	$ 0.56	$ 1.46	$ 1.14
Weighted-average number of shares outstanding (in ‘000’s)
Basic (in shares)	270,299	271,271	272,533
Effect of dilutive securities (in shares)	152	638	946
Diluted (in shares)	270,451	271,909	273,479
Excluded as anti-dilutive (in shares)	8,909	4,927	4,147