Separate Accounts, Death Benefits and Other Insurance Benefit Features (Details 1) (USD $) In Millions, unless otherwise specified			6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 MAV Only [Member]	Jun. 30, 2013 With 5% rollup [Member]	Jun. 30, 2013 With Earnings Protection Benefit Rider (EPB) [Member]	Jun. 30, 2013 With 5% rollup & EPB [Member]	Jun. 30, 2013 Asset Protection Benefit ("APB") [Member]	Jun. 30, 2013 Lifetime Income Benefit ("LIB") - Death Benefit [Member]	Jun. 30, 2013 Reset [Member]	Jun. 30, 2013 Return of Premium ("ROP")/Other [Member]	Jun. 30, 2013 Guaranteed Minimum Death Benefit [Member] U.S. [Member]	Jun. 30, 2013 Guaranteed Minimum Death Benefit [Member] JAPAN [Member]	Jun. 30, 2013 Guaranteed Minimum Income Benefit [Member] JAPAN [Member]
Individual Variable and Group Annuity Account Value by GMDB/GMIB Type
Account Value (AV)	$ 26,414		$ 19,409	$ 1,566	$ 4,874	$ 565	$ 19,028	$ 994	$ 3,161	$ 21,035	$ 70,632	$ 14,405	$ 14,203
Net Amount at Risk (NAR)	4,350		3,360	312	560	118	588	16	96	161	5,211	910	754
Retained Net Amount at Risk (RNAR)	254		210	21	18	5	117	4	46	34	455	0	0
Weighted Average Attained Age of Annuitant			69 years	69 years	67 years	70 years	67 years	66 years	69 years	67 years	68 years	69 years	69 years
Less: General Account Value with U.S. GMDB	7,263
Subtotal Separate Account Liabilities with U.S. GMDB	63,369
Separate Account Liabilities without U.S. GMDB	84,606
Total Separate Account Liabilities	$ 147,975	$ 141,558