Accumulated Other Comprehensive Income (Loss) - Components of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components Of Accumulated Other Comprehensive Income Loss [Line Items]
Derivatives(1)	$ 77	$ 73	$ 117
DAC/VOBA and Sales inducements adjustments on available-for-sale securities	(567)	(855)	(551)
Premium deficiency reserve adjustment	0	(434)	(211)
Other	0	2	0
Unrealized capital gains (losses), before tax	1,636	2,216	1,468
Deferred income tax asset (liability)	(215)	(337)	(180)
Unrealized capital gains (losses), after tax	1,421	1,879	1,288
Pension and other postretirement benefits liability, net of tax	2	3	4
AOCI	1,423	1,882	1,292
Fixed maturities
Components Of Accumulated Other Comprehensive Income Loss [Line Items]
Fixed maturities, net of impairment	2,126	$ 3,430	$ 2,113
Other Contract
Components Of Accumulated Other Comprehensive Income Loss [Line Items]
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	$ 20