Deferred Policy Acquisition Costs - Life Deferred Acquisition Costs Rollforward by Product (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	$ 1,109	$ 1,046	$ 1,013	$ 916
Capitalized deferred policy acquisition costs	365	336	1,166	1,097
Amortized deferred policy acquisition costs	(373)	(349)	(1,078)	(980)
Deferred policy acquisition costs asset, end of period	1,101	1,033	1,101	1,033
Term Life Insurance
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	233	222	228	215
Capitalized deferred policy acquisition costs	8	9	24	27
Amortized deferred policy acquisition costs	(7)	(5)	(18)	(16)
Deferred policy acquisition costs asset, end of period	234	226	234	226
Whole Life Insurance
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	45	40	43	38
Capitalized deferred policy acquisition costs	2	2	6	5
Amortized deferred policy acquisition costs	0	(1)	(2)	(2)
Deferred policy acquisition costs asset, end of period	47	41	47	41
Deferred Fixed Annuity
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	8	7	7	7
Capitalized deferred policy acquisition costs	0	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	54	53	54
Capitalized deferred policy acquisition costs	0	0	1	1
Amortized deferred policy acquisition costs	0	(1)	(2)	(2)
Deferred policy acquisition costs asset, end of period	52	53	52	53
Life Insurance Segment
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	338	323	331	314
Capitalized deferred policy acquisition costs	10	11	32	33
Amortized deferred policy acquisition costs	(7)	(7)	(22)	(20)
Deferred policy acquisition costs asset, end of period	$ 341	$ 327	$ 341	$ 327