Deferred Policy Acquisition Costs - Rollforward of DAC and DSI Adoption Adjustments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost	$ 12,085	$ 12,857	$ 13,001		$ 12,955
Life and Retirement
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost				$ 10,466
Deferred sale inducement cost	497	558	619		679
Life and Retirement | As Previously Reported
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost					7,316
Deferred sale inducement cost					281
Life and Retirement | Effect of Change | ASU 2018-12
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost					3,150
Deferred sale inducement cost					398
Life and Retirement | Individual Retirement
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost	4,735	4,597	4,553	4,421	4,421
Deferred sale inducement cost	333	381	428		474
Life and Retirement | Individual Retirement | As Previously Reported
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost					2,359
Deferred sale inducement cost					190
Life and Retirement | Individual Retirement | Effect of Change | ASU 2018-12
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost					2,062
Deferred sale inducement cost					284
Life and Retirement | Group Retirement
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost	1,056	1,060	1,078	1,094	1,094
Deferred sale inducement cost	164	177	191		205
Life and Retirement | Group Retirement | As Previously Reported
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost					560
Deferred sale inducement cost					91
Life and Retirement | Group Retirement | Effect of Change | ASU 2018-12
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost					534
Deferred sale inducement cost					114
Life and Retirement | Life Insurance
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost	4,149	4,839	4,904	4,918	4,918
Life and Retirement | Life Insurance | As Previously Reported
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost					4,371
Life and Retirement | Life Insurance | Effect of Change | ASU 2018-12
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost					547
Life and Retirement | Institutional Markets
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost				$ 33
Life and Retirement | Institutional Markets | As Previously Reported
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost					26
Life and Retirement | Institutional Markets | Effect of Change | ASU 2018-12
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost					7
General Insurance
Summary of Significant Accounting Policies [Line Items]
Deferred acquisition cost	$ 2,075	$ 2,310	$ 2,428		$ 2,489