CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2012	Jun. 30, 2012
Common Class A
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	650,000,000	650,000,000
Common stock, shares issued	402,794,363	399,491,292
Treasury stock, shares	165,362,593	162,371,840
Common Class B
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	240,000,000	240,000,000
Common stock, shares issued	149,778,082	151,778,082
Common stock, shares outstanding	149,778,082	151,778,082