Variable Annuity and Insurance Guarantees (Liability Rollforward) (Details 4) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
GMDB and GGU [Member]
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period		$ 9	$ 4	$ 4
Incurred claims		10	9	4
Paid claims		(5)	(4)	(4)
Balance, at the end of the period		14	9	4
GMIB [Member]
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period		7	6	9
Incurred claims		1	1	(2)
Paid claims		0		(1)
Balance, at the end of the period		8	7	6
GMWB [Member]
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	[1]	693	(383)	799
Incurred claims	[1]	364	1,076	(1,182)
Balance, at the end of the period	[1]	1,057	693	(383)
GMAB [Member]
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period	[1]	(41)	(62)	103
Incurred claims	[1]	41	21	(165)
Balance, at the end of the period	[1]		(41)	(62)
UL [Member]
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross
Balance, at the beginning of the period		263	206	155
Incurred claims		92	75	67
Paid claims		(23)	(18)	(16)
Balance, at the end of the period		$ 332	$ 263	$ 206

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