CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2013	Jun. 30, 2013
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	410,998,745	407,988,891
Treasury stock, shares	171,775,415	168,972,698
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	148,728,082	148,978,082
Common stock, shares outstanding	148,728,082	148,978,082