Derivatives (Details 1) (Not Designated as Hedging Instrument [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (3)		$ 36		$ 4
MBS with embedded derivatives [Member] | Realized gains on securities [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	3		(3)		5
Public company warrants [Member] | Realized gains on securities [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	0		3		0
Interest rate swaptions [Member] | Realized gains on securities [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(2)		1		(4)
Fixed-indexed annuities (embedded derivative) [Member] | Annuity benefits [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(182)	[1]	(182)	[1]	(57)	[1]
Equity index call options [Member] | Annuity benefits [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	181		210		66
Reinsurance contracts (embedded derivative) [Member] | Net investment income [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (3)		$ 7		$ (6)

[1] The change in fair value of the embedded derivative includes gains related to unlocking of actuarial assumptions of $58 million in 2014, $2 million in 2013 and $36 million in 2012.