Deferred Policy Acquisition Costs - Life Deferred Acquisition Costs Rollforward by Product (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	$ 1,048	$ 984	$ 1,013	$ 916
Capitalized deferred policy acquisition costs	418	385	801	761
Amortized deferred policy acquisition costs	(357)	(323)	(705)	(631)
Deferred policy acquisition costs asset, end of period	1,109	1,046	1,109	1,046
Term Life Insurance
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	231	220	228	215
Capitalized deferred policy acquisition costs	7	8	16	18
Amortized deferred policy acquisition costs	(5)	(6)	(11)	(11)
Deferred policy acquisition costs asset, end of period	233	222	233	222
Whole Life Insurance
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	44	39	43	38
Capitalized deferred policy acquisition costs	2	1	4	3
Amortized deferred policy acquisition costs	(1)	0	(2)	(1)
Deferred policy acquisition costs asset, end of period	45	40	45	40
Deferred Fixed Annuity
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	7	7	7	7
Capitalized deferred policy acquisition costs	1	0	1	0
Amortized deferred policy acquisition costs	0	0	0	0
Deferred policy acquisition costs asset, end of period	8	7	8	7
Universal life
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	52	53	53	54
Capitalized deferred policy acquisition costs	1	1	1	1
Amortized deferred policy acquisition costs	(1)	0	(2)	(1)
Deferred policy acquisition costs asset, end of period	52	54	52	54
Life Insurance Segment
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	334	319	331	314
Capitalized deferred policy acquisition costs	11	10	22	22
Amortized deferred policy acquisition costs	(7)	(6)	(15)	(13)
Deferred policy acquisition costs asset, end of period	$ 338	$ 323	$ 338	$ 323