CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Millions	Dec. 31, 2015	Sep. 30, 2015
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	1,926	1,950
Common stock, shares outstanding	1,926	1,950
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	19	20
Common stock, shares outstanding	19	20