Investments- Unrealized Net Capital Gains and Losses (Details 9) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Fair value
Fixed income securities	$ 23,425	$ 24,222
Equity securities	1,662	1,511
Short-term investments	712	566
Derivative instruments	1	5
Gross unrealized Gains
Fixed income securities	1,431	1,310
Equity securities	272	117
Short-term investments	0	0
Derivative instruments	2	5
Gross unrealized Losses
Fixed income securities	(87)	(200)
Equity securities	(16)	(35)
Short-term investments	0	0
Derivative instruments	(1)	0
Unrealized net gains (losses)
Fixed income securities	1,344	1,110
Equity securities	256	82
Short-term investments	0	0
Derivative instruments	1	5
Equity method ("EMA") limited partnerships	0	(2)
Unrealized net capital gains and losses, pre-tax	1,601	1,195
Amount recognized for:
Insurance reserves	0	0
DAC and DSI	(195)	(140)
Amounts recognized	(195)	(140)
Deferred income taxes	(497)	(374)
Total unrealized net capital gains and losses	909	681
Fair value of derivative securities classified as assets, with unrealized net gains (losses) in AOCI	$ 1	$ 5