Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2012	Sep. 30, 2011
Common stock,par value	$ 1	$ 1
Common stock, shares authorized	640,000,000	640,000,000
Common stock, shares issued	332,662,160	332,662,160
Common stock in treasury, shares	135,751,039	117,844,159