Financial Instruments and Derivative Financial Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Long-term debt excluding capital leases	$ 162.8	$ 166.8
Long-term debt book value	162.0	166.0
Notional amount of foreign currency derivatives	8.6	10.5
Foreign currency derivatives at fair value, net (less than $0.1 million at 2012)	0.2	(0.1)
Cash flow hedge gain (loss) to be reclassified within twelve months	0.1
Fair value of all interest rate swap agreements, net	(0.2)	(0.5)
Interest rate cash flow hedge gain (loss) to be reclassified during next twelve months	$ (0.1)