Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Sep. 30, 2012
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable	$ 107,000,000	$ 109,000,000
Preferred Stock, Par Value Per Share	$ 2.50	$ 2.50
Preferred Stock, Shares Authorized	5,400,000	5,400,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
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	722,641,142	724,113,291
Treasury Stock, Shares	230,712,870	229,240,721