Derivatives (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest rate swap duration, minimum	5 years
Interest rate swap duration, maximum	10 years
Non-hedge derivatives immaterial	not material
Intercompany Foreign Currency Derivatives, Cash (Paid) Received At Settlement	$ (0.5)	$ 2.4	$ 3.8
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ (1.5)
Fair Value Of Non Hedge Derivatives Immaterial Assertion	not material
Fair value hedge ineffectiveness	The Company did not realize any ineffectiveness related to fair value hedges during 2012, 2011 and 2010.
Cash flow hedge ineffectiveness	not material