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Derivative Financial Instruments (Details - Non-hedge accounting) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Accounts Payable Accrued Expenses And Other Liabilities [Member]
Written Options Gmib Liability [Member]
Non designated [Member]
Dec. 31, 2011
Accounts Payable Accrued Expenses And Other Liabilities [Member]
Written Options Gmib Liability [Member]
Non designated [Member]
Jun. 30, 2012
Other Assets [Member]
Purchased Options Gmib Asset [Member]
Non designated [Member]
Dec. 31, 2011
Other Assets [Member]
Purchased Options Gmib Asset [Member]
Non designated [Member]
Jun. 30, 2012
Other Assets [Member]
Interest Rate Swap Growth Interest [Member]
Non designated [Member]
Dec. 31, 2011
Other Assets [Member]
Interest Rate Swap Growth Interest [Member]
Non designated [Member]
Jun. 30, 2012
Guaranteed Minimum Income Benefits Fair Value Gain Loss [Member]
Written Options Gmib Liability [Member]
Non designated [Member]
Jun. 30, 2011
Guaranteed Minimum Income Benefits Fair Value Gain Loss [Member]
Written Options Gmib Liability [Member]
Non designated [Member]
Jun. 30, 2012
Guaranteed Minimum Income Benefits Fair Value Gain Loss [Member]
Written Options Gmib Liability [Member]
Non designated [Member]
Jun. 30, 2011
Guaranteed Minimum Income Benefits Fair Value Gain Loss [Member]
Written Options Gmib Liability [Member]
Non designated [Member]
Jun. 30, 2012
Guaranteed Minimum Income Benefits Fair Value Gain Loss [Member]
Purchased Options Gmib Asset [Member]
Non designated [Member]
Jun. 30, 2011
Guaranteed Minimum Income Benefits Fair Value Gain Loss [Member]
Purchased Options Gmib Asset [Member]
Non designated [Member]
Jun. 30, 2012
Guaranteed Minimum Income Benefits Fair Value Gain Loss [Member]
Purchased Options Gmib Asset [Member]
Non designated [Member]
Jun. 30, 2011
Guaranteed Minimum Income Benefits Fair Value Gain Loss [Member]
Purchased Options Gmib Asset [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Guaranteed Minimum Income Benefits Equity Futures [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Guaranteed Minimum Income Benefits Equity Futures [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Guaranteed Minimum Income Benefits Equity Futures [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Guaranteed Minimum Income Benefits Equity Futures [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Guaranteed Minimum Death Benefits Equity Futures [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Guaranteed Minimum Death Benefits Equity Futures [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Guaranteed Minimum Death Benefits Equity Futures [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Guaranteed Minimum Death Benefits Equity Futures [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Interest Rate Futures Growth Interest [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Interest Rate Futures Growth Interest [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Interest Rate Futures Growth Interest [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Interest Rate Futures Growth Interest [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Guaranteed Minimum Income Benefits Growth Interest [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Guaranteed Minimum Income Benefits Growth Interest [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Guaranteed Minimum Income Benefits Growth Interest [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Guaranteed Minimum Income Benefits Growth Interest [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Guaranteed Minimum Death Benefits Growth Interest [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Guaranteed Minimum Death Benefits Growth Interest [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Guaranteed Minimum Death Benefits Growth Interest [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Guaranteed Minimum Death Benefits Growth Interest [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Interest Rate Swap Growth Interest [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Interest Rate Swap Growth Interest [Member]
Non designated [Member]
Jun. 30, 2012
Other Revenue [Member]
Interest Rate Swap Growth Interest [Member]
Non designated [Member]
Jun. 30, 2011
Other Revenue [Member]
Interest Rate Swap Growth Interest [Member]
Non designated [Member]
Jun. 30, 2012
Notional [Member]
Written Options Gmib Liability [Member]
Non designated [Member]
Dec. 31, 2011
Notional [Member]
Written Options Gmib Liability [Member]
Non designated [Member]
Jun. 30, 2012
Notional [Member]
Purchased Options Gmib Asset [Member]
Non designated [Member]
Dec. 31, 2011
Notional [Member]
Purchased Options Gmib Asset [Member]
Non designated [Member]
Jun. 30, 2012
Notional [Member]
Equity And Currency Futures Contract [Member]
Non designated [Member]
Dec. 31, 2011
Notional [Member]
Equity And Currency Futures Contract [Member]
Non designated [Member]
Jun. 30, 2012
Notional [Member]
Treasury Interest Rate Futures Growth Interest [Member]
Non designated [Member]
Dec. 31, 2011
Notional [Member]
Treasury Interest Rate Futures Growth Interest [Member]
Non designated [Member]
Jun. 30, 2012
Notional [Member]
Eurodollar Interest Rate Futures Growth Interest [Member]
Non designated [Member]
Dec. 31, 2011
Notional [Member]
Eurodollar Interest Rate Futures Growth Interest [Member]
Non designated [Member]
Jun. 30, 2012
Notional [Member]
Interest Rate Swap Growth Interest [Member]
Non designated [Member]
Dec. 31, 2011
Notional [Member]
Interest Rate Swap Growth Interest [Member]
Non designated [Member]
Derivative [Line Items]                                                                                                      
Derivative Fair Value   $ 1,332 $ 1,333 $ 707 $ 712 $ 37 $ 33                                                                                        
Derivative Gain Loss               186 85 33 48 (99) (48) (13) (27) 2 0 (6) 0 20 (5) (64) (49) (2) (1) (1) 0 1 1 1 2 8 6 5 10 11 8 7 12                        
Notional Amount Of Derivatives                                                                               $ 1,212 $ 1,244 $ 666 $ 684 $ 934 $ 994 $ 54 $ 29 $ 633 $ 598 $ 240 $ 240
Derivative Financial Instruments Text Details [Abstract]                                                                                                      
Foreign Currency Swaps Cash Flow Hedge Maximum Term 9