Income Tax (Deferred Tax Asset Valuation Allowance Associated With Branch Restructuring) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation Allowance [Line Items]
Balance, beginning of period	$ 368
Income tax expense (benefit)	152	(695)	2,380
Deferred income tax expense (benefit) related to unrealized investment gains (losses)	3,017	(3,279)	(2,936)
Balance, end of period	357	368
American Life Branch Restructuring [Member]
Valuation Allowance [Line Items]
Balance, beginning of period	25	23
Income tax expense (benefit)	4	12
Deferred income tax expense (benefit) related to unrealized investment gains (losses)	2	(10)
Offsetting Reduction In Gross Deferred Tax Asset Related To The Branch Transfer Of Assets To Foreign Subsidies	(31)	0
Balance, end of period	$ 0	$ 25