Deferred Policy Acquisition Costs and Present Value of Future Profits (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amortization - Unlock, Pre-Tax	$ 904	$ (124)
Disposition of DAC Asset	2,229	0
Deferred policy acquisition costs and present value of future profits	2,431		5,725
Adjustments to Unrealized Gains and Losses on Securities Available for Sale and Other	(25)	21
Retirement Plans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Disposition of DAC Asset	0
Adjustments to Unrealized Gains and Losses on Securities Available for Sale and Other	0
Individual Life [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Disposition of DAC Asset	0
Adjustments to Unrealized Gains and Losses on Securities Available for Sale and Other	0
Individual Annuity [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amortization - Unlock, Pre-Tax	$ 0