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
Fair Value Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Calculation
Balance at the beginning of the period	$ (553)	$ (723)	$ (653)
Total gains (losses) included in: net income	109	168	(134)
Issues	(117)	(79)	(100)
Settlements	8	81	164
Balance at the end of the period	(553)	(553)	(723)
Derivatives embedded in life and annuity contracts
Fair Value Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Calculation
Balance at the beginning of the 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 the end of the period	(307)	(553)	(723)
Liabilities held for sale
Fair Value Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Calculation
Total gains (losses) included in: net income	20
Transfer to held for sale	(265)
Issues	(6)
Settlements	5
Balance at the end of the period	$ (246)