Financial instruments - Gain (losses) on derivative financial instruments recorded in consolidated statement if income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Deal-contingent forward contracts
Derivative [Line Items]
Gains (loss) on derivative financial instruments	$ 0	$ (246,983)	$ (389,992)	$ (396,365)
Forward exchange contracts
Derivative [Line Items]
Gains (loss) on derivative financial instruments	7,378	24,201	(7,425)	46,953
Costless collar contracts
Derivative [Line Items]
Gains (loss) on derivative financial instruments	4,308	(1,751)	9,632	(4,625)
Cross-currency swap contracts
Derivative [Line Items]
Gains (loss) on derivative financial instruments	$ (2,976)	$ 0	$ (18,739)	$ 0