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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 31, 2019
Jun. 30, 2019
Common Class A    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 1,300,000,000 1,300,000,000
Common stock, shares issued 448,452,843 443,685,124
Treasury stock, shares 226,278,070 222,120,630
Common Class B    
Common stock, shares authorized 304,000,000 304,000,000
Common stock, shares issued 137,220,914 139,537,814
Common stock, shares outstanding 137,220,914 139,537,814