Variable Annuity and Insurance Guarantees (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended			6 Months Ended
Jun. 30, 2012 GMDB and GGU	Jun. 30, 2011 GMDB and GGU	Jun. 30, 2012 GMIB	Jun. 30, 2011 GMIB	Dec. 31, 2010 GMIB	Jun. 30, 2012 Variable annuity guaranteed minimum withdrawal benefits ("GMWB")	Jun. 30, 2011 Variable annuity guaranteed minimum withdrawal benefits ("GMWB")	Jun. 30, 2012 Variable annuity guaranteed minimum accumulation benefits ("GMAB")	Jun. 30, 2011 Variable annuity guaranteed minimum accumulation benefits ("GMAB")	Jun. 30, 2012 UL	Jun. 30, 2011 UL
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	$ 5	$ 5	$ 9	$ 8	$ 8	$ 1,377	$ 337	$ 237	$ 104	$ 111	$ 68
Incurred claims	2	3				(119)	(68)	(57)	(33)	33	25
Paid claims	(5)	(3)	(1)							(5)	(5)
Balance, at the end of the period	$ 2	$ 5	$ 8	$ 8	$ 8	$ 1,258	$ 269	$ 180	$ 71	$ 139	$ 88

Sum of the amount of expected guaranteed benefits in excess of the projected account balances for minimum guaranteed benefit contracts as of the balance sheet date for all guaranteed benefit types.

+ References+ Details

Total of amount of guaranteed minimum benefit expense incurred during the period presented, resulting in an increase to the liability for expected guaranteed minimum benefits in excess of projected account values, for all guaranteed benefit types.

+ References+ Details

- Definition

Total amount of guaranteed minimum benefit payments to policyholders and contract holders, during the period presented, resulting in a decrease to the liability for expected guaranteed minimum benefits in excess of projected account values, for all guaranteed benefit types.

+ References+ Details