Investments (Details 2) (Common Stock, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Common Stock
Fair Value
Less than 12 months	$ 5.9	$ 25.7
Greater than 12 months	0	0
Total	5.9	25.7
Unrealized losses
Less than 12 months	0.4	1.9
Greater than 12 months	0	0
Total	$ 0.4	$ 1.9