XML 572 R93.htm IDEA: XBRL DOCUMENT v3.10.0.1
Dividends (Details)
12 Months Ended
Jun. 30, 2018
USD ($)
$ / shares
Jun. 30, 2018
GBP (£)
£ / shares
Jun. 30, 2017
USD ($)
$ / shares
Jun. 30, 2017
GBP (£)
£ / shares
Jun. 30, 2016
USD ($)
$ / shares
Jun. 30, 2016
GBP (£)
£ / shares
Dividends            
Dividends paid $ 29,555,000 £ 21,982,000 $ 29,525,000 £ 23,295,000 $ 29,501,000 £ 20,084,000
Dividends paid per share | (per share) $ 0.18 £ 0.13 $ 0.18 £ 0.14 $ 0.18 £ 0.12