Derivative Financial Instruments (Details 9) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Gains/(losses) for derivatives not Designated as hedging instrument
Net investment income	$ 5,098	$ 4,061	$ 10,414	$ 8,381
Policyholder benefits and claims	9,119	6,930	17,350	14,394
Other revenues	592	544	1,158	1,057
Other Expenses	4,552	2,746	8,712	5,405
Currency futures [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	0	0	9	0
Net investment income	0	0	0	0
Policyholder benefits and claims	0	0	0	0
Other revenues	0	0	0	0
Other Expenses	0	0	0	0
Equity options [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	52	1,366	(367)	984
Net investment income	(4)	59	(11)	37
Policyholder benefits and claims	0	0	0	0
Other revenues	0	0	0	0
Other Expenses	0	0	0	0
Equity futures [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	1	(87)	55	(169)
Net investment income	10	21	3	10
Policyholder benefits and claims	(6)	159	(108)	71
Other revenues	0	0	0	0
Other Expenses	0	0	0	0
Interest rate futures [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	(47)	87	(49)	67
Net investment income	0	(1)	1	(6)
Policyholder benefits and claims	0	0	0	0
Other revenues	(4)	(3)	(4)	(3)
Other Expenses	0	0	0	0
Total rate of return swaps [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	1	(31)	(1)	(19)
Net investment income	0	0	0	0
Policyholder benefits and claims	0	0	0	0
Other revenues	0	0	0	0
Other Expenses	0	0	0	0
Variance swaps [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	(14)	450	(91)	330
Net investment income	0	11	(3)	8
Policyholder benefits and claims	0	0	0	0
Other revenues	0	0	0	0
Other Expenses	0	0	0	0
Credit default swaps [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	31	12	(14)	15
Net investment income	(1)	3	(1)	3
Policyholder benefits and claims	0	0	0	0
Other revenues	0	0	0	0
Other Expenses	0	0	0	0
Currency options [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	(13)	14	(45)	17
Net investment income	0	0	0	(1)
Policyholder benefits and claims	0	0	0	0
Other revenues	0	0	0	0
Other Expenses	0	0	0	(4)
Foreign currency forwards [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	29	266	(140)	325
Net investment income	0	30	(9)	38
Policyholder benefits and claims	0	0	0	0
Other revenues	0	0	0	0
Other Expenses	0	0	0	0
Foreign currency swaps [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	(71)	288	(192)	346
Net investment income	0	0	0	0
Policyholder benefits and claims	0	0	0	0
Other revenues	0	0	0	0
Other Expenses	0	0	0	0
Interest rate forwards [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	0	0	0	8
Net investment income	0	0	0	0
Policyholder benefits and claims	0	0	0	0
Other revenues	(31)	(53)	(39)	(86)
Other Expenses	0	0	0	0
Interest rate options [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	13	50	(14)	50
Net investment income	0	0	0	0
Policyholder benefits and claims	0	0	0	0
Other revenues	6	1	(3)	(1)
Other Expenses	0	0	0	0
Interest rate caps [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	(73)	(98)	(82)	(211)
Net investment income	0	0	0	0
Policyholder benefits and claims	0	0	0	0
Other revenues	0	0	0	0
Other Expenses	0	0	0	0
Interest rate floors [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	107	281	(18)	274
Net investment income	0	0	0	0
Policyholder benefits and claims	0	0	0	0
Other revenues	0	0	0	0
Other Expenses	0	0	0	0
Interest rate swaps [Member] | Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	644	962	374	1,043
Net investment income	(1)	4	(2)	3
Policyholder benefits and claims	0	36	0	39
Other revenues	72	199	24	256
Other Expenses	0	0	0	0
Derivative Instruments Gain Loss By Income Statement Location [Member]
Gains/(losses) for derivatives not Designated as hedging instrument
Net Derivative Gains (Losses)	660	3,560	(575)	3,060
Net investment income	4	127	(22)	92
Policyholder benefits and claims	(6)	195	(108)	110
Other revenues	43	144	(22)	166
Other Expenses	$ 0	$ 0	$ 0	$ (4)