Investments - Unrealized net capital gains and losses included in AOCI (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Fair value
Fixed income securities:	$ 58,484	$ 57,170
Short-term investments	3,740	3,027
Derivative instruments	0	0
Gross unrealized Gains
Fixed income securities	2,567	993
Short-term investments	0	0
Derivative instruments	0	0
Gross unrealized Losses
Fixed income securities	(91)	(957)
Short-term investments	0	0
Derivative instruments	(3)	(3)
Unrealized net gains (losses)
Fixed income securities	2,476	36
Short-term investments	0	0
Derivative instruments	(3)	(3)
Equity method of accounting (“EMA”) limited partnerships	(1)	0
Unrealized net capital gains and losses, pre-tax	2,472	33
Amount recognized for:
Insurance reserves	(178)	0
DAC and DSI	(194)	(33)
Amounts recognized	(372)	(33)
Deferred income taxes	(446)	(2)
Total unrealized net capital gains and losses	$ 1,654	$ (2)