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Equity - Share repurchases (Details) - $ / shares
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Oct. 22, 2014
Equity, Class of Treasury Stock [Line Items]        
Shares repurchased (in shares) 663,599 1,281,818 331,259  
Average price per share including commissions (in USD per share) $ 301.39 $ 296.71 $ 301.88  
Maximum        
Equity, Class of Treasury Stock [Line Items]        
Number of shares authorized for repurchase       35,000,000