Earnings per share - Computation of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	[1],[2],[3],[4],[5],[6],[7]	Mar. 31, 2022	Mar. 31, 2021	[1],[2],[3],[4],[5],[6],[7]
Numerator:
Net income attributable to common shareholders, basic	$ 348,017	$ 473,153		$ 1,186,774	$ 1,241,307
Net income attributable to common shareholders, diluted	$ 348,017	$ 473,153		$ 1,186,774	$ 1,241,307
Denominator:
Basic - weighted average common shares (in shares)	128,426,675	129,085,563		128,549,040	128,935,696
Increase in weighted average common shares from dilutive effect of equity-based awards (in shares)	1,916,906	2,292,370		1,889,553	1,690,904
Diluted - weighted average common shares, assuming exercise of equity-based awards (in shares)	130,343,581	131,377,933		130,438,593	130,626,600
Basic earnings per share (in USD per share)	$ 2.71	$ 3.67		$ 9.23	$ 9.63
Diluted earnings per share (in USD per share)	$ 2.67	$ 3.60		$ 9.10	$ 9.50

[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.

[4] *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.

[5] *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.

[6] *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.

[7] *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.