Investments (Details 8) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Fair value
Fixed income securities	$ 24,222	$ 24,629
Equity securities	1,511	1,542
Short-term investments	566	816
Derivative instruments	5	10
Gross unrealized Gains
Fixed income securities	1,310	1,321
Equity securities	117	76
Short-term investments	0	0
Derivative instruments	5	10
Gross unrealized Losses
Fixed income securities	(200)	(462)
Equity securities	(35)	(60)
Short-term investments	0	0
Derivative instruments	0	0
Unrealized net gains (losses)
Fixed income securities	1,110	859
Equity securities	82	16
Short-term investments	0	0
Derivative instruments	5	10
EMA limited partnerships	(2)	(2)
Unrealized net capital gains and losses, pre-tax	1,195	883
Amounts recognized for:
Amounts recognized for:	0	0
DAC and DSI	(140)	(62)
Amounts recognized	(140)	(62)
Deferred income taxes	(374)	(293)
Total unrealized net capital gains and losses	681	528
Fair value of derivative securities classified as assets, with unrealized net gains (losses) in AOCI	$ 5	6
Fair value of derivative securities classified as liabilities, with unrealized net gains (losses) in AOCI		$ (4)