Variable Annuity and Insurance Guarantees (Details 2) (USD $) In Millions	6 Months Ended			6 Months Ended
Jun. 30, 2011 GMDB and GGU	Jun. 30, 2010 GMDB and GGU	Jun. 30, 2010 GMIB	Jun. 30, 2011 GMIB	Dec. 31, 2010 GMIB	Jun. 30, 2011 Variable annuity guaranteed minimum withdrawal benefits ("GMWB")	Jun. 30, 2010 Variable annuity guaranteed minimum withdrawal benefits ("GMWB")	Jun. 30, 2011 Variable annuity guaranteed minimum accumulation benefits ("GMAB")	Jun. 30, 2010 Variable annuity guaranteed minimum accumulation benefits ("GMAB")	Jun. 30, 2011 UL	Jun. 30, 2010 UL
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Liability balance, at the beginning of the period	$ 5	$ 6	$ 6	$ 8	$ 8	$ 337	$ 204	$ 104	$ 100	$ 68	$ 15
Incurred claims	3	11	1			(68)	638	(33)	147	25	8
Paid claims	(3)	(10)								(5)	(3)
Liability balance, at the end of the period	$ 5	$ 7	$ 7	$ 8	$ 8	$ 269	$ 842	$ 71	$ 247	$ 88	$ 20

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 03-1
-Paragraph 38

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 03-1
-Section Appendix C
-Paragraph 46
-Subparagraph C-1

+ Details

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- Definition

Amount of expected guaranteed benefits in excess of the projected account balances for minimum guaranteed benefit contracts, as of the balance sheet date.

+ References

+ Details

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- Definition

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.

+ References

+ Details

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