Investments - Unrealized Net Capital Gains and Losses (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Fair value
Fixed income securities	$ 21,843	$ 21,400
Short-term investments	1,217	810
Gross unrealized Gains
Fixed income securities	1,386	732
Short-term investments	0	0
Gross unrealized Losses
Fixed income securities	(55)	(389)
Short-term investments	0	0
Unrealized net gains (losses)
Fixed income securities	1,331	343
Short-term investments	0	0
EMA limited partnerships	(1)	0
Unrealized net capital gains and losses, pre-tax	1,330	343
Amount recognized for:
Insurance reserves	(178)	0
DAC and DSI	(191)	(35)
Amounts recognized	(369)	(35)
Deferred income taxes	(202)	(65)
Total unrealized net capital gains and losses	$ 759	$ 243