Variable Annuity and Insurance Guarantees (Liability Rollforward) (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
GMDB and GGU [Member]
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	$ 4		$ 4		$ 5
Incurred claims	9		4		6
Paid claims	(4)		(4)		(7)
Balance, at the end of the period	9		4		4
GMIB [Member]
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	6		9		9
Incurred claims	1		(2)		1
Paid claims			(1)		(1)
Balance, at the end of the period	7		6		9
GMWB [Member]
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	(383)	[1]	799	[1]	1,377	[1]
Incurred claims	1,076	[1]	(1,182)	[1]	(578)	[1]
Balance, at the end of the period	693	[1]	(383)	[1]	799	[1]
GMAB [Member]
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	(62)	[1]	103	[1]	237	[1]
Incurred claims	21	[1]	(165)	[1]	(134)	[1]
Balance, at the end of the period	(41)	[1]	(62)	[1]	103	[1]
UL [Member]
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	206		155		111
Incurred claims	67		67		57
Paid claims	(10)		(16)		(13)
Balance, at the end of the period	$ 263		$ 206		$ 155

[1] The incurred claims for GMWB and GMAB represent the total change in the liabilities (contra liabilities).