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Organization and Principles of Consolidation Recent Accounting Pronouncements (Details) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets $ 7.8 $ 8.2