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Share-based payments, 2021 Executive Director Long-term Target Options (Details)
12 Months Ended
Sep. 14, 2021
shares
$ / shares
Jun. 30, 2022
shares
Tranche
$ / shares
Jun. 30, 2021
shares
$ / shares
Share-based payments [Abstract]      
Number of share options granted (in shares) | shares   5,126,484 2,693,944
Exercise price (in dollars per share) | $ / shares   $ 71.19 $ 3.91
Number of tranches | Tranche   3  
2021 Executive Director Long-term Target Options [Member]      
Share-based payments [Abstract]      
Number of share options granted (in shares) | shares   4,800,000  
Exercise price (in dollars per share) | $ / shares   $ 75.00  
Contractual exercise period   12 years  
Number of tranches | Tranche   4  
2021 Executive Director Long-term Target Options [Member] | Entities Controlled by Daniel Roberts [Member]      
Share-based payments [Abstract]      
Number of share options granted (in shares) | shares 2,400,000    
Exercise price (in dollars per share) | $ / shares   $ 75  
2021 Executive Director Long-term Target Options [Member] | Entities Controlled by William Roberts [Member]      
Share-based payments [Abstract]      
Number of share options granted (in shares) | shares 2,400,000    
Exercise price (in dollars per share) | $ / shares   $ 75  
2021 Executive Director Long-term Target Options [Member] | Tranche One [Member]      
Share-based payments [Abstract]      
Number of trading days   20 days  
Number of share options expected to vest (in shares) | shares 600,000    
2021 Executive Director Long-term Target Options [Member] | Tranche One [Member] | Minimum [Member]      
Share-based payments [Abstract]      
Volume weighted average market price (in dollars per share) | $ / shares $ 370    
2021 Executive Director Long-term Target Options [Member] | Tranche Two [Member]      
Share-based payments [Abstract]      
Number of trading days   20 days  
Number of share options expected to vest (in shares) | shares 600,000    
2021 Executive Director Long-term Target Options [Member] | Tranche Two [Member] | Minimum [Member]      
Share-based payments [Abstract]      
Volume weighted average market price (in dollars per share) | $ / shares $ 650    
2021 Executive Director Long-term Target Options [Member] | Tranche Three [Member]      
Share-based payments [Abstract]      
Number of trading days   20 days  
Number of share options expected to vest (in shares) | shares 600,000    
2021 Executive Director Long-term Target Options [Member] | Tranche Three [Member] | Minimum [Member]      
Share-based payments [Abstract]      
Volume weighted average market price (in dollars per share) | $ / shares $ 925    
2021 Executive Director Long-term Target Options [Member] | Tranche Four [Member]      
Share-based payments [Abstract]      
Number of trading days   20 days  
Number of share options expected to vest (in shares) | shares 600,000    
2021 Executive Director Long-term Target Options [Member] | Tranche Four [Member] | Minimum [Member]      
Share-based payments [Abstract]      
Volume weighted average market price (in dollars per share) | $ / shares $ 1,850