CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2018	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	435,413,976	429,968,260
Common stock, shares outstanding	224,093,800	224,341,200
Treasury stock, shares	211,320,208	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	143,051,679	143,762,288
Common stock, shares outstanding	143,051,679	143,762,288