Debt - Amounts of Long-Term Debt (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Amounts of long-term debt [Abstract]
Borrowings under revolving credit agreement	$ 123.2	$ 114.6
Senior notes	125.0	125.0
Other notes payable	1.8	10.2
Total long term debt	250.0	249.8
Less: current portion	(0.9)	(1.0)
Long-term debt, excluding current maturities	$ 249.1	$ 248.8