Investments (Details 3) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
The scheduled maturities of available for sale fixed maturities
Fixed maturities amortized cost, One year or less	$ 812
Fixed maturities fair value, One year or less	826
Fixed maturities fair value, One year or less, Percent	3.00%
Fixed maturities amortized cost, After one year through five years	4,144
Fixed maturities fair value, After one year through five years	4,483
Fixed maturities fair value, After one year through five years, Percent	15.00%
Fixed maturities amortized cost, After five years through ten years	7,910
Fixed maturities fair value, After five years through ten years	8,277
Fixed maturities fair value, After five years through ten years, Percent	27.00%
Fixed maturities amortized cost, After ten years	5,425
Fixed maturities fair value, After ten years	5,680
Fixed maturities fair value, After ten years, Percent	19.00%
Fixed maturities amortized cost, Subtotal	18,291
Fixed maturities fair value, Subtotal	19,266
Fixed maturities fair value, Subtotal, Percent	64.00%
Fixed maturities amortized cost, ABS	3,601
Fixed maturities fair value, ABS	3,619
Fixed maturities fair value, ABS, Percent	12.00%
Fixed maturities amortized cost, MBS	6,517
Fixed maturities fair value, MBS	7,080
Fixed maturities fair value, MBS, Percent	24.00%
Fixed Maturity [Member]
The scheduled maturities of available for sale fixed maturities
Amortized Cost	28,409	25,366
Fair Value	$ 29,965	$ 26,456
Fair value, Total, Percent	100.00%