Financial Instruments (Details 5) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Euro-denominated revolving credit facilities designated as a hedge of the Company's net investment in its subsidiary [Member]
Net investment hedge derivative instruments on OCI
Amount of (Loss) Gain Recognized in OCI on Derivative (Effective Portion)	$ (0.1)	$ (2.7)
Canadian dollar-denominated revolving credit facilities designated as a hedge of the Company's net investment in its subsidiaries [Member]
Net investment hedge derivative instruments on OCI
Amount of (Loss) Gain Recognized in OCI on Derivative (Effective Portion)	$ (1.3)	$ (2.9)