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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Statement of Stockholders' Equity [Abstract]      
Dividends declared per common share (in dollars per share) $ 0.6300 $ 0.5478 $ 0.4770