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Derivatives (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 20	$ (26)	$ 22	$ (24)
Derivatives (Textual) [Abstract]
Notional amount of pay-fixed interest rate swaptions	700		700
Payments to purchase swaptions			20
Indexed annuities as a percentage of annuity benefits	40.00%		40.00%
Equity index call options [Member] \| Annuity benefits [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	16	(21)	93	36
Fixed-indexed annuities (embedded derivative) [Member] \| Annuity benefits [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 3	$ 3	$ (77)	$ (57)

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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