Earnings per share - Computation of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net income attributable to common shareholders	$ 451,157	$ 319,803	[1]
Denominator:
Basic - weighted average common shares (in shares)	128,726,721	128,707,745
Increase in weighted average common shares from dilutive effect of equity-based awards (in shares)	2,101,250	1,586,478
Diluted - weighted average common shares, assuming exercise of equity-based awards (in shares)	130,827,971	130,294,223
Basic earnings per share (in USD per share)	$ 3.50	$ 2.48	[2]
Diluted earnings per share (in USD per share)	$ 3.45	$ 2.45	[3]

[1] *Prior period has been adjusted to reflect the change in inventory accounting method, as described in the Company's fiscal 2021 Annual Report on Form 10-K.

[2] *Prior period has been adjusted to reflect the change in inventory accounting method, as described in the Company's fiscal 2021 Annual Report on Form 10-K.

[3] *Prior period has been adjusted to reflect the change in inventory accounting method, as described in the Company's fiscal 2021 Annual Report on Form 10-K.