Fair Value of Assets and Liabilities (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Rollforward of Level 3 assets held at fair value on a recurring basis
Balance at beginning of period	$ (553)	$ (553)
Total gains (losses) included in: net income	15	6
Issues	(15)	(24)
Settlements	4	4
Balance at end of period	(549)	(567)
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	(307)	(553)
Total gains (losses) included in: net income	(2)	6
Issues	(11)	(24)
Settlements	1	4
Balance at end of period	(319)	(567)
Liabilities held for sale
Rollforward of Level 3 assets held at fair value on a recurring basis
Balance at beginning of period	(246)
Total gains (losses) included in: net income	17
Issues	(4)
Settlements	3
Balance at end of period	$ (230)