Description of Business and Summary of Significant Accounting Policies (Variable Interest Entity) (Details) (Variable Interest Entity, Primary Beneficiary [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Ownership Percentage	40.00%
Carrying Amount, Assets and Liabilities	$ 16.8	$ 0.2