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Fair Value Measurements, Nonrecurring (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Fair Value Measurements (Textual)    
Assets measured at fair value, nonrecurring $ 0 $ 0
Liabilities measured at fair value, nonrecurring $ 0 $ 0