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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Sep. 30, 2021
Jun. 30, 2021
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Treasury stock, shares 230,791,699 229,115,665
Common Class A    
Common stock, shares authorized 1,300,000,000 1,300,000,000
Common stock, shares issued 463,201,084 462,633,034
Common Class B    
Common stock, shares authorized 304,000,000 304,000,000
Common stock, shares issued 128,242,029 128,242,029
Common stock, shares outstanding 128,242,029 128,242,029