Investments Investments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Investments [Abstract]
Gain on Sale of Investments	$ 0.1	$ 0.3
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax		0.1
Restricted Investments, Current	8.2
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	37.3	31.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 2.0	$ 2.2