Variable Annuity and Insurance Guarantees (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
GMDB and GGU
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	$ 5	$ 5
Incurred claims		2
Paid claims	(2)	(2)
Balance, at the end of the period	3	5
GMIB
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	9	8
Incurred claims	(2)
Paid claims		(1)
Balance, at the end of the period	7	7
Variable annuity guaranteed minimum withdrawal benefits ("GMWB")
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	1,377	337
Incurred claims	(624)	(173)
Balance, at the end of the period	753	164
Variable annuity guaranteed minimum accumulation benefits ("GMAB")
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	237	104
Incurred claims	(119)	(55)
Balance, at the end of the period	118	49
UL
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	111	68
Incurred claims	17	12
Paid claims	(4)	(2)
Balance, at the end of the period	$ 124	$ 78