Insurance Liabilities - Adjustments to Policyholder Contract Deposits (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Jan. 01, 2021	Dec. 31, 2020
Policyholder Account Balance [Line Items]
Policyholder contract deposits	$ 161,979	$ 155,984	$ 148,223
Life And Retirement, Excluding Other Operations
Policyholder Account Balance [Line Items]
Policyholder contract deposits				$ 148,422
Life And Retirement, Excluding Other Operations | Individual Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits				79,203
Life And Retirement, Excluding Other Operations | Group Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits				43,229
Life And Retirement, Excluding Other Operations | Life Insurance
Policyholder Account Balance [Line Items]
Policyholder contract deposits				10,286
Life And Retirement, Excluding Other Operations | Institutional Markets
Policyholder Account Balance [Line Items]
Policyholder contract deposits				11,559
Life And Retirement, Excluding Other Operations | Other
Policyholder Account Balance [Line Items]
Policyholder contract deposits				4,145
Life And Retirement, Excluding Other Operations | Other Operations
Policyholder Account Balance [Line Items]
Policyholder contract deposits				(199)
As Previously Reported
Policyholder Account Balance [Line Items]
Policyholder contract deposits		$ 158,891	$ 154,470
As Previously Reported | Life And Retirement, Excluding Other Operations
Policyholder Account Balance [Line Items]
Policyholder contract deposits				154,669
As Previously Reported | Life And Retirement, Excluding Other Operations | Individual Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits				84,874
As Previously Reported | Life And Retirement, Excluding Other Operations | Group Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits				43,805
As Previously Reported | Life And Retirement, Excluding Other Operations | Life Insurance
Policyholder Account Balance [Line Items]
Policyholder contract deposits				10,286
As Previously Reported | Life And Retirement, Excluding Other Operations | Institutional Markets
Policyholder Account Balance [Line Items]
Policyholder contract deposits				11,559
As Previously Reported | Life And Retirement, Excluding Other Operations | Other
Policyholder Account Balance [Line Items]
Policyholder contract deposits				4,145
Adjustment for the reclassification of the embedded derivative liability to market risk benefits, net of the host adjustment(s) | Life And Retirement, Excluding Other Operations
Policyholder Account Balance [Line Items]
Policyholder contract deposits				(6,247)
Adjustment for the reclassification of the embedded derivative liability to market risk benefits, net of the host adjustment(s) | Life And Retirement, Excluding Other Operations | Individual Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits				(5,671)
Adjustment for the reclassification of the embedded derivative liability to market risk benefits, net of the host adjustment(s) | Life And Retirement, Excluding Other Operations | Group Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits				(576)
Adjustment for the reclassification of the embedded derivative liability to market risk benefits, net of the host adjustment(s) | Life And Retirement, Excluding Other Operations | Life Insurance
Policyholder Account Balance [Line Items]
Policyholder contract deposits				0
Adjustment for the reclassification of the embedded derivative liability to market risk benefits, net of the host adjustment(s) | Life And Retirement, Excluding Other Operations | Institutional Markets
Policyholder Account Balance [Line Items]
Policyholder contract deposits				0
Adjustment for the reclassification of the embedded derivative liability to market risk benefits, net of the host adjustment(s) | Life And Retirement, Excluding Other Operations | Other
Policyholder Account Balance [Line Items]
Policyholder contract deposits				$ 0