Investments - Change in unrealized net capital gains and losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss)
Change in unrealized net capital gains and losses	$ (4,140)	$ 2,152	$ 2,711
Amounts recognized for:
Insurance reserves	496	(370)	(126)
DAC and DSI	365	(140)	(191)
Reclassification of noncontrolling interest	4	0	0
Amounts recognized	865	(510)	(317)
Deferred income taxes	693	(349)	(505)
(Decrease) increase in unrealized net capital gains and losses, after-tax	(2,582)	1,293	1,889
EMA limited partnerships
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss)
Change in unrealized net capital gains and losses	0	0	(4)
Fixed income and equity securities
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss)
Change in unrealized net capital gains and losses	(2,369)	0	0
Fixed income securities
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss)
Change in unrealized net capital gains and losses	$ (1,771)	$ 2,152	$ 2,715