Earnings per share - Computation of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net income attributable to common shareholders, basic	$ 387,854	$ 451,157	[1]
Net income attributable to common shareholders, diluted	$ 387,854	$ 451,157
Denominator:
Basic - weighted average common shares (in shares)	128,425,002	128,726,721
Increase in weighted average common shares from dilutive effect of equity-based awards (in shares)	1,517,406	2,101,250
Diluted - weighted average common shares, assuming exercise of equity-based awards (in shares)	129,942,408	130,827,971
Basic earnings per share (in USD per share)	$ 3.02	$ 3.50	[1]
Diluted earnings per share (in USD per share)	$ 2.98	$ 3.45	[1],[2]

[1] *Prior period amounts have been reclassified to reflect the income statement reclassification as described in Note 1.

[2] *Prior period amounts have been reclassified to reflect the income statement reclassification as described in Note 1.