Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Accounts receivable, allowances	$ 57	$ 55
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	10,000	10,000
Common stock, shares issued	1,055	1,055
Common stock, shares outstanding	1,055	1,055