Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred income tax assets:
Liabilities for future policy benefits and claims	$ 918	$ 1,320
Investment related	627	104
Deferred compensation	335	310
Investment impairments and write-downs	97	105
Loss carryovers and tax credit carryforwards	39	39
Other	61	54
Gross deferred income tax assets	2,077	1,932
Less: Valuation allowance	(19)	(16)
Total deferred income tax assets	2,058	1,916
Deferred income tax liabilities:
Deferred acquisition costs	749	701
Deferred sales inducement costs	145	142
Net unrealized gains on available-for-sale securities	352	708
Depreciation expense	138	164
Intangible assets	84	74
Other	113	82
Gross deferred income tax liabilities	1,581	1,871
Net deferred income tax liabilities	477	45
State net operating losses	39
Reconciliation of gross unrecognized tax benefits (expense)
Gross unrecognized tax benefits, balance at the beginning of the period	116	184	75
Additions based on tax positions related to the current year	22	2	1
Additions for tax positions of prior years	74	25	95
Reductions for tax positions of prior years	(3)	(83)	(8)
Settlements	0	(12)	21
Gross unrecognized tax benefits, balance at the end of the period	209	116	184
Unrecognized tax benefits (net of federal tax benefits) that would impact the effective tax rate	62	38	38
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	150
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	160
Increase (reduction) in interest and penalties	6	(1)	66
Accrued interest and penalties	(42)	(36)
Income tax provision (benefit) amounts of items comprising other comprehensive income (loss)
Net unrealized securities gains	(344)	238	90
Net unrealized derivatives gains (losses)	0	4	(15)
Defined benefit plans	24	(9)	(28)
Foreign currency translation	3	7	(1)
Net income tax provision (benefit)	$ (317)	$ 240	$ 46