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Subsequent Events (Details) - $ / shares
12 Months Ended
Aug. 02, 2018
May 03, 2018
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Subsequent Event          
Cash dividends declared (in dollars per share)     $ 2.52 $ 2.14 $ 2.08
Regular Cash Dividend          
Subsequent Event          
Cash dividends declared (in dollars per share)   $ 0.75      
Regular Cash Dividend | Subsequent Event          
Subsequent Event          
Cash dividends declared (in dollars per share) $ 0.75