Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Jun. 30, 2013
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	379,294,477	379,174,445
Common stock, outstanding net of treasury stock	379,294,477	379,174,445
Common stock, treasury shares	27,338,065	27,395,821
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