CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2015	Jun. 30, 2015
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	420,966,841	418,530,857
Treasury stock, shares	198,231,512	190,694,630
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	146,658,737	147,046,137
Common stock, shares outstanding	146,658,737	147,046,137