v2.4.0.8
CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Millions, except Per Share data, unless otherwise specified
Jun. 30, 2013
Sep. 30, 2012
Preferred Stock
    
Preferred stock, par value $ 0.0001 $ 0.0001
Preferred stock, shares authorized 25 25
Preferred stock, shares issued 0 0
Class A common stock
    
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 2,001,622 2,001,622
Common stock, shares issued 515 535
Common stock, shares outstanding 515 535
Class B common stock
    
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 622 622
Common stock, shares issued 245 245
Common stock, shares outstanding 245 245
Class C common stock
    
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 1,097 1,097
Common stock, shares issued 27 31
Common stock, shares outstanding 27 31