Deferred Policy Acquisition Costs and Value of Business Acquired (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Beginning balance	$ 938
Amortization:
Ending balance	920	$ 938
Movement Analysis Of Value of Business Acquired VOBA [Roll Forward]
Beginning balance	348	375	$ 426
Present Value of Future Insurance Profits, Addition from Acquisition	3	4	4
Present Value of Future Insurance Profits, Amortization Expense	30	31	55
Ending balance	321	348	375
Movement Analysis of Deferred Policy Acquisition Costs and Value of Business Acquired (VOBA) [Roll Forward]
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Amortization	(76)	(81)	(112)
Estimated amount of VOBA amortization expense, net of interest:
2020	23
2021	21
2022	20
2023	18
2024	17
Retirement
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Beginning balance	578	573	568
Deferred Policy Acquisition Cost, Capitalization	56	54	55
Amortization:
Deferred Policy Acquisition Costs, Amortization Expense	45	49	50
Ending balance	589	578	$ 573
Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Beginning balance	12
Amortization:
Ending balance	$ 10	$ 12