XML 50 R36.htm IDEA: XBRL DOCUMENT v3.4.0.3
Fair Value Measurements Level 4 Pricing Controls and Broker Inputs to Valuation (Details) - USD ($)
 3 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount $ 0   $ 0
Derivative Financial Instruments, Assets [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value Measurements, Valuation Techniques Derivative instruments are fair valued using pricing valuation models for OTC derivatives that utilize independent market data inputs, quoted market prices for exchange-traded and OTC-cleared derivatives, or independent broker quotations. Excluding embedded and reinsurance related derivatives, as of March 31, 2016 and December 31, 2015, 96% and 96%, respectively, of derivatives, based upon notional values, were priced by valuation models, including discounted cash flow models and option-pricing models that utilize present value techniques, or quoted market prices. The remaining derivatives were priced by broker quotations.    
US Treasury Securities [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount $ 741,000,000 $ 106,000,000