Financial instruments - Gain (losses) on derivative financial instruments recorded in consolidated statement if income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Deal-contingent forward contracts
Derivative [Line Items]
Gains (loss) on derivative financial instruments	$ 0	$ (149,382)	$ (389,992)	$ (149,382)
Forward exchange contracts
Derivative [Line Items]
Gains (loss) on derivative financial instruments	(13,439)	18,410	(14,803)	22,752
Costless collar contracts
Derivative [Line Items]
Gains (loss) on derivative financial instruments	(65)	(553)	5,324	(2,874)
Cross-currency swap contracts
Derivative [Line Items]
Gains (loss) on derivative financial instruments	$ (20,422)	$ 0	$ (15,763)	$ 0