CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
CONSOLIDATED BALANCE SHEETS [Abstract]
Trade accounts receivable, allowances	$ 38.5	$ 26.7
Preferred stock, no par value
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, no par value
Common stock , shares authorized	199,000,000	199,000,000
Common stock , shares issued	80,323,912	80,323,912
Treasury stock, shares	19,526,989	18,637,540