Deferred Policy Acquisition Costs - Rollforward of DSI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
Summary of Significant Accounting Policies [Line Items]
Aggregate carrying amount in the Condensed Consolidated Balance Sheets	$ 12,085	$ 12,857		$ 12,955
Other assets, excluding DSI	12,600	11,800	$ 14,000		$ 12,800
Life and Retirement
Summary of Significant Accounting Policies [Line Items]
Balance, beginning of year	558	619	679
Capitalization	8	9	10
Amortization expense	(69)	(70)	(70)
Balance, end of period	497	558	619
Life and Retirement | Individual Retirement
Summary of Significant Accounting Policies [Line Items]
Balance, beginning of year	381	428	474
Capitalization	7	9	10
Amortization expense	(55)	(56)	(56)
Balance, end of period	333	381	428
Life and Retirement | Group Retirement
Summary of Significant Accounting Policies [Line Items]
Balance, beginning of year	177	191	205
Capitalization	1	0	0
Amortization expense	(14)	(14)	(14)
Balance, end of period	$ 164	$ 177	$ 191