Accumulated Other Comprehensive Income - Parenthetical (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity [Abstract]
Tax (benefit) expense included in net unrealized gains (losses)	$ (617)	$ 136	$ 605
Tax included in reclassification	(80)	(60)	(53)
Other than Temporary impairment losses, Tax (benefit)	(47)	0	0
Tax included in reclassification	4	0	0
Tax (benefit) expense included in net unrealized gains (losses)	78	10	(115)
Tax included in reclassification	4	7	5
Tax included in unfunded pension liability	5	4	(5)
Tax Effect of Net Unrealized Gains in Other Than Temporary Impairment Losses, Portion in Other Comprehensive Income (Loss) Net of Tax, Portion Attrible to Parent, Available-for-sale Securites	0	0	0
Tax Effect Of Reclassification Adjustment Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Available For Sale Securities	0	0	1
Tax Effect Of Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost And Transition Obligation Recognized In Net Periodic Pension Cost	$ 1	$ 1	$ 2