Accumulated Other Comprehensive Income (Loss) - Components of AOCI (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Fixed maturities, net of impairment	$ (3,669)		$ 3,521
Derivatives	187		82
DAC/VOBA adjustment on available-for-sale securities(2)	817		(821)
Premium deficiency reserve adjustment(2)	0		(15)
Other intangibles adjustment on available-for-sale securities(2)	(8)		5
Unrealized capital gains (losses), before tax	(2,673)		2,772
Deferred income tax asset (liability)	684		(459)
Net unrealized capital gains (losses)	(1,989)		2,313
Pension and other postretirement benefits liability, net of tax	3		3
AOCI	(1,986)	$ 2,100	$ 2,316
Other Contract
Accumulated Other Comprehensive Income (Loss) [Line Items]
Portion of AOCI expected to be reclassified into earnings within next 12 months	$ 19