Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2015	Jun. 30, 2014
Common stock, par value	$ 0.01
Common stock, shares authorized	25,000,000
Class A Common Stock [Member]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,500,000,000	1,500,000,000
Common stock, shares issued, net of treasury stock	381,914,964	379,392,985
Common stock outstanding, net of treasury stock	381,914,964	379,392,985
Common stock, treasury shares	27,368,413	27,333,277
Class B Common Stock [Member]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued, net of treasury stock	199,630,240	199,630,240
Common stock outstanding, net of treasury stock	199,630,240	199,630,240
Common stock, treasury shares	78,430,424	78,430,424