Investments (Details 8) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Fair value
Fixed income securities	$ 24,629	$ 28,117
Equity securities	1,542	970
Short-term investments	816	857
Derivative instruments	10	2
Gross unrealized Gains
Fixed income securities	1,321	2,486
Equity securities	76	57
Short-term investments	0	0
Derivative instruments	10	3
Gross unrealized Losses
Fixed income securities	(462)	(191)
Equity securities	(60)	(14)
Short-term investments	0	0
Derivative instruments	0	(1)
Unrealized net gains (losses)
Fixed income securities	859	2,295
Equity securities	16	43
Short-term investments	0	0
Derivative instruments	10	2
EMA limited partnerships	(2)	(2)
Investments classified as held for sale		0
Unrealized net capital gains and losses, pre-tax	883	2,338
Amounts recognized for:
Insurance reserves	0	(28)
DAC and DSI	(62)	(176)
Amounts recognized	(62)	(204)
Deferred income taxes	(293)	(752)
Total unrealized net capital gains and losses	528	1,382
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)