3. Fair Value Measurements Fair Value and Gross Unrealized Losses with Unrealized Losses (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Tolerable variance Level 2 debt security pricing	1.00%
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 2.3	$ 0.3
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	73.9	99.0
Gross unrealized losses for investments in a loss position 12 months or more	0.1	0.1
Gross unrealized losses for investments in a loss position less than 12 months	$ 0.8	$ 0.5
Cost Method Investment, Percentage Owned	35.00%