Investments - Unrealized net capital gains and losses included in AOCI (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair value
Fixed income securities	$ 42,136	$ 42,565
Short-term investments	4,009	6,807
Derivative instruments	0	0
Gross unrealized Gains
Fixed income securities	1,002	2,563
Short-term investments	0	0
Derivative instruments	0	0
Gross unrealized Losses
Fixed income securities	(242)	(32)
Short-term investments	0	0
Derivative instruments	(3)	(3)
Unrealized net gains (losses)
Fixed income securities	760	2,531
Short-term investments	0	0
Derivative instruments	(3)	(3)
EMA limited partnerships	(1)	(1)
Investments classified as held for sale	0	2,369
Unrealized net capital gains and losses, pre-tax	756	4,896
Amounts recognized for:
Insurance reserves	0	(496)
DAC and DSI	1	(364)
Reclassification of noncontrolling interest	4
Amounts recognized	5	(860)
Deferred income taxes	(163)	(856)
Unrealized net capital gains and losses	$ 598	$ 3,180