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Investment Contracts Insurance Liabilities And Insurance Annuity Benefits (Details) - USD ($)
$ in Millions
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Total $ 27,578 $ 26,544  
Reinsurance Recoverables Gross $ 240 $ 250 $ 234
Minimum [Member]      
Life Insurance Benefits Net Level Premium Method Using Estimated Yields 3.00% 3.00%  
Maximum [Member]      
Life Insurance Benefits Net Level Premium Method Using Estimated Yields 8.50% 8.50%  
Consolidation, Eliminations [Member]      
Total $ (449) $ (435)  
Parent [Member]      
Investment contracts 2,970 3,144  
Guaranteed interest contracts 1,000 1,471  
Total investment contracts 3,970 4,615  
Liability for Future Policy Benefits, Life 20,688 18,959  
Other Investment Contracts 3,369 3,405  
Total 28,027 26,979  
Reinsurance Recoverables Allowance $ 1,759 $ 1,685