Supplemental Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Cash Flow Information [Abstract]
Interest income received	$ 2.7	$ 3.3	$ 3.5
Interest expense paid	11.1	20.5	20.6
Taxes paid net of refunds	17.0
Net tax refunds		0.8	14.4
Payments to employees related to SARs exercises	$ 8.2	$ 5.8	$ 2.0