Deferred Policy Acquisition Costs - Life Deferred Acquisition Costs Rollforward by Product (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	$ 1,013	$ 916	$ 838
Deferred Policy Acquisition Cost, Capitalization	1,530	1,427	1,254
Deferred Policy Acquisition Costs, Amortization Expense	(1,450)	(1,330)	(1,176)
Deferred policy acquisition costs asset, end of period	1,093	1,013	916
Term Life Insurance
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	228	215	201
Deferred Policy Acquisition Cost, Capitalization	30	34	35
Deferred Policy Acquisition Costs, Amortization Expense	(22)	(21)	(21)
Deferred policy acquisition costs asset, end of period	236	228	215
Whole Life Insurance
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	43	38	35
Deferred Policy Acquisition Cost, Capitalization	8	7	5
Deferred Policy Acquisition Costs, Amortization Expense	(3)	(2)	(2)
Deferred policy acquisition costs asset, end of period	48	43	38
Deferred Fixed Annuity
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	7	7	6
Deferred Policy Acquisition Cost, Capitalization	2	1	1
Deferred Policy Acquisition Costs, Amortization Expense	(1)	(1)	0
Deferred policy acquisition costs asset, end of period	8	7	7
Universal Life
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	53	54	54
Deferred Policy Acquisition Cost, Capitalization	2	2	2
Deferred Policy Acquisition Costs, Amortization Expense	(3)	(3)	(2)
Deferred policy acquisition costs asset, end of period	52	53	54
Life Insurance Segment
Movement Analysis of Deferred Policy Acquisition Costs
Deferred policy acquisition costs asset, beginning of period	331	314	296
Deferred Policy Acquisition Cost, Capitalization	42	44	43
Deferred Policy Acquisition Costs, Amortization Expense	(29)	(27)	(25)
Deferred policy acquisition costs asset, end of period	$ 344	$ 331	$ 314