Investments-Unrealized Net Capitla Gains and Losses (Details 9) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Fair value
Fixed income securities	$ 24,443	$ 24,629
Equity securities	1,344	1,542
Short-term investments	1,545	816
Derivative instruments	7	10
Gross unrealized Gains
Fixed income securities	1,616	1,321
Equity securities	78	76
Short-term investments	0	0
Derivative instruments	7	10
Gross unrealized Losses
Fixed income securities	(308)	(462)
Equity securities	(64)	(60)
Short-term investments	0	0
Derivative instruments	0	0
Unrealized net gains (losses)
Fixed income securities	1,308	859
Equity securities	14	16
Short-term investments	0	0
Derivative instruments	7	10
Equity method ("EMA") limited partnerships	(3)	(2)
Unrealized net capital gains and losses, pre-tax	1,326	883
Amount recognized for:
Insurance reserves	0	0
DAC and DSI	(135)	(62)
Amounts recognized	(135)	(62)
Deferred income taxes	(422)	(293)
Total unrealized net capital gains and losses	769	528
Fair value of derivative securities classified as assets, with unrealized net gains (losses) in AOCI	3	6
Fair value of derivative securities classified as liabilities, with unrealized net gains (losses) in AOCI	$ (4)	$ (4)