CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income for the period	$ 103,406	$ 74,427
Other comprehensive income (loss)—net of tax:
Net foreign currency translation adjustments	22,645	(5,611)
Unrealized gain (loss) on cash flow hedges:
Unrealized gain (loss) - net of tax expense (recovery) effect of $305 and $(206) for the three months ended September 30, 2020 and 2019, respectively	845	(572)
(Gain) loss reclassified into net income - net of tax (expense) recovery effect of $(56) and $3 for the three months ended September 30, 2020 and 2019, respectively	(156)	8
Actuarial gain (loss) relating to defined benefit pension plans:
Actuarial gain (loss) - net of tax expense (recovery) effect of $(916) and $(1,249) for the three months ended September 30, 2020 and 2019, respectively	(1,705)	(3,084)
Amortization of actuarial (gain) loss into net income - net of tax (expense) recovery effect of $87 and $146 for the three months ended September 30, 2020 and 2019, respectively	241	231
Total other comprehensive income (loss) net, for the period	21,870	(9,028)
Total comprehensive income	125,276	65,399
Comprehensive (income) loss attributable to non-controlling interests	(30)	(26)
Total comprehensive income attributable to OpenText	$ 125,246	$ 65,373