Contingencies And Commitments Contingencies and Commitments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Corporate Debt [Member]
Other Commitments [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed	$ 4.0
Corporate Debt [Member] | Due on or before December 31, 2015 [Member]
Other Commitments [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed	2.0
Corporate Debt [Member] | Due on or before June 12, 2016 [Member]
Other Commitments [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed	2.0
Loans [Member]
Other Commitments [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed	70.0
Amount Purchased Under Commitment	$ 11.8