CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2017	Jun. 30, 2017
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	431,707,987	429,968,260
Treasury stock, shares	206,604,964	205,627,082
Common Class B
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	304,000,000	304,000,000
Common stock, shares issued	143,419,528	143,762,288
Common stock, shares outstanding	143,419,528	143,762,288