Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable	$ 111	$ 103
Common Stock, Par Value Per Share	$ 0.50	$ 0.50
Common Stock, Shares Authorized	1,200,000,000	1,200,000,000
Common Stock, Shares Issued	953,354,012	953,354,012
Common Stock, Shares Outstanding	699,153,376	706,660,259
Treasury Stock, Shares	254,200,636	246,693,753