Investments - Unrealized net capital gains and losses included in AOCI (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Fair value
Fixed income securities	$ 41,715	$ 42,136
Short-term investments	4,030	4,009
Derivative instruments	0	0
Gross unrealized Gains
Fixed income securities	12	1,002
Short-term investments	0	0
Derivative instruments	0	0
Gross unrealized Losses
Fixed income securities	(3,765)	(242)
Short-term investments	(1)	0
Derivative instruments	(3)	(3)
Unrealized net gains (losses)
Fixed income securities	(3,753)	760
Short-term investments	(1)	0
Derivative instruments	(3)	(3)
Equity method of accounting limited partnerships	7	(1)
Unrealized net capital gains and losses, pre-tax	(3,750)	756
Amounts recognized for:
Other unrealized net capital gains and losses, pre-tax	32	5
Deferred income taxes	791	(163)
Unrealized net capital gains and losses, after-tax	$ (2,927)	$ 598