Financing Agreements (Schedule of Total Debt) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Long-term Debt, by Current and Noncurrent [Abstract]
Total debt	$ 349.8	$ 352.7
Less current portion of debt	115.2	115.2
Total long-term debt	234.6	237.5
Outstanding Finance Credit Lines [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Total debt	0.2	0.2
Revolving Credit Facility [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Total debt	105.0	105.0
Term Loan [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Less current portion of debt	10.0	10.0
Total long-term debt	185.0	187.5
Unsecured 7.00% Debentures due on February 15, 2024 [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Total debt	19.6	19.6
Unsecured debenture interest rate	7.00%
Debt instrument, maturity date	Feb. 15, 2024
Unsecured 6.75% Debentures due on December 15, 2027 [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Total debt	29.8	29.8
Unsecured debenture interest rate	6.75%
Debt instrument, maturity date	Dec. 15, 2027
Other [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Total debt	$ 0.2	$ 0.6