Consolidated Balance Sheet (Parenthetical) (USD $)	Jun. 30, 2012	Sep. 30, 2011
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 96,000,000	$ 104,000,000
Preferred Stock, Par or Stated 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 or Stated 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	729,345,876	738,877,768
Treasury Stock, Shares	224,008,136	214,476,244