Fair Value of Assets and Liabilities (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Rollforward of Level 3 assets held at fair value on a recurring basis
Balance at beginning of period	$ (553)	$ (723)	$ (653)
Total gains (losses) included in: net income	109	168	(134)
Issues	(117)	(79)	(100)
Settlements	8	81	164
Balance at end of period	(553)	(553)	(723)
Derivatives embedded in life and annuity contracts
Rollforward of Level 3 assets held at fair value on a recurring basis
Balance at beginning of period	(553)	(723)	(653)
Total gains (losses) included in: net income	89	168	(134)
Transfer to held for sale	(265)
Issues	(111)	(79)	(100)
Settlements	3	81	164
Balance at end of period	(307)	(553)	(723)
Liabilities held for sale
Rollforward of Level 3 assets held at fair value on a recurring basis
Total gains (losses) included in: net income	20
Transfer to held for sale	265
Issues	(6)
Settlements	5
Balance at end of period	$ (246)