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Subsequent events (Details) - $ / shares
3 Months Ended 9 Months Ended
Apr. 20, 2022
Jan. 19, 2022
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Dividends [Abstract]            
Common stock, dividends declared (in dollars per share)     $ 0.13 $ 0.12 $ 0.39 $ 0.36
2022 Annual Dividend [Member]            
Dividends [Abstract]            
Common stock, dividends declared (in dollars per share)   $ 0.52        
Subsequent Event [Member] | 2022 Annual Dividend [Member]            
Dividends [Abstract]            
Common stock, dividends declared (in dollars per share) $ 0.52          
Subsequent Event [Member] | 2022 Q3 Dividend [Member]            
Dividends [Abstract]            
Dividends payable, date declared Apr. 20, 2022          
Common stock, dividends declared (in dollars per share) $ 0.13          
Dividends payable, date of record May 13, 2022          
Dividends payable, date to be paid May 31, 2022