Investments (Details 9) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Fair value
Fair value	$ 57,948	$ 62,440
Equity securities	5,082	4,104
Short-term investments	2,122	2,540
Derivative instruments	10	2
Gross unrealized Gains
Fixed income securities	1,707	3,082
Equity securities	415	467
Short-term investments	0	0
Derivative instruments	10	3
Gross unrealized Losses
Fixed income securities	(960)	(314)
Equity securities	(139)	(55)
Short-term investments	0	0
Derivative instruments	(4)	(5)
Unrealized net gains (losses)
Fixed income securities	747	2,768
Equity securities	276	412
Short-term investments	0	0
Derivative instruments	6	(2)
EMA limited partnerships	(4)	(5)
Unrealized net capital gains and losses, pre-tax	1,025	3,173
Amounts recognized for:
Insurance reserves	0	(28)
DAC and DSI	(67)	(179)
Amounts recognized	(67)	(207)
Deferred income taxes	(338)	(1,040)
Total unrealized net capital gains and losses	620	1,926
Fair value of derivative securities classified as assets, with unrealized net gains (losses) in AOCI	6	3
Fair value of derivative securities classified as liabilities, with unrealized net gains (losses) in AOCI	$ (4)	$ 1