Deferred Policy Acquisition Costs - Rollforward of DSI (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Jan. 01, 2021	Dec. 31, 2020
Summary of Significant Accounting Policies [Line Items]
Aggregate carrying amount in the Condensed Consolidated Balance Sheets	$ 11,999		$ 12,857	$ 12,955
Other assets, excluding DSI	11,300	$ 11,900			$ 12,800
Deferred Sale Inducements
Summary of Significant Accounting Policies [Line Items]
Balance, beginning of year	558	619
Capitalization	5	5
Amortization expense	(51)	(51)
Balance, end of period	512	573
Deferred Sale Inducements | Individual Retirement
Summary of Significant Accounting Policies [Line Items]
Balance, beginning of year	381	428
Capitalization	5	5
Amortization expense	(41)	(41)
Balance, end of period	345	392
Deferred Sale Inducements | Group Retirement
Summary of Significant Accounting Policies [Line Items]
Balance, beginning of year	177	191
Capitalization	0	0
Amortization expense	(10)	(10)
Balance, end of period	$ 167	$ 181