Investments (Details 8) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Fair value
Fixed income securities	$ 45,534	$ 45,428
Equity securities	190	179
Short-term investments	857	593
Derivative instruments	(11)	(12)
Gross unrealized Gains
Fixed income securities	3,728	3,207
Equity securities	47	38
Derivative instruments		3
Gross unrealized Losses
Fixed income securities	(862)	(1,260)
Equity securities		(2)
Derivative instruments	(11)	(15)
Unrealized net gains (losses)
Fixed income securities	2,866	1,947
Equity securities	47	36
Derivative instruments	(11)	(12)
EMA limited partnerships	2	1
Unrealized net capital gains and losses, pre-tax	2,904	1,972
Amount recognized for:
Insurance reserves	(700)	(594)
DAC and DSI	(348)	(120)
Amounts recognized	(1,048)	(714)
Deferred income taxes	(655)	(445)
Total unrealized net capital gains and losses	1,201	813
Fair value of derivative securities classified as assets, with unrealized net gains (losses) in AOCI	(6)	(5)
Fair value of derivative securities classified as liabilities, with unrealized net gains (losses) in AOCI	$ 5	$ 7

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Deferred Policy Acquisition Costs and Deferred Sales Inducement Costs adjustment included in accumulated other comprehensive income (loss) which represents the amount by which the amortization of DAC and DSI would increase or decrease if the unrealized gains or losses in the respective product portfolios were realized.

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Insurance reserve adjustment included in accumulated other comprehensive income (loss) which represents the amount by which the reserve balance would increase if the net unrealized gains in the applicable product portfolios were realized and reinvested at current lower interest rates, resulting in a premium deficiency.

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Amount of debt securities categorized neither as held-to-maturity nor trading.

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