Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2016	Jun. 30, 2015
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	380,286,788	381,914,964
Common stock outstanding, net of treasury stock	380,286,788	381,914,964
Common stock, treasury shares	27,368,413	27,368,413
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