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Closed Block (Closed Block Liabilities and Assets Designated to Closed Block; Maximum Future Earnings to be Recognized) (Details) (USD $)
In Millions
Sep. 30, 2011
Dec. 31, 2010
Closed Block Liabilities  
Future policy benefits$ 51,413$ 51,632
Policyholders' dividends payable958909
Policyholders' dividend obligation4,1842,243
Policyholders' account balances5,4915,536
Other Closed Block liabilities5,2324,637
Total Closed Block Liabilities67,27864,957
Closed Block Assets  
Fixed maturities, available for sale, at fair value42,63141,044
Other trading account assets, at fair value272150
Equity securities, available for sale, at fair value2,9013,545
Commercial mortgage and other loans8,4047,827
Policy loans5,3075,377
Other long-term investments2,0841,662
Short-term investments1,0721,119
Total investments62,67160,724
Cash and cash equivalents694345
Accrued investment income623600
Other Closed Block assets290275
Total Closed Block Assets64,27861,944
Excess of reported Closed Block Liabilities over Closed Block Assets3,0003,013
Portion of above representing accumulated other comprehensive income:  
Net unrealized investment gains (losses)3,6442,092
Allocated to policyholder dividend obligation(3,662)(2,117)
Future earnings to be recognized from Closed Block Assets and Closed Block Liabilities$ 2,982$ 2,988