Policyholder Contract Deposits and Other Policyholder Funds - Policyholder Contract Deposit (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
Policyholder Account Balance [Line Items]
Policyholder contract deposits	$ 162,050	$ 156,058	$ 151,545	$ 148,421	$ 148,421
Policy earnings (as a percent)	0.90%	1.30%	1.70%
Individual Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits	$ 93,467	$ 87,418	$ 82,808		79,203
Group Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits	41,069	43,076	43,643		43,228
Life Insurance
Policyholder Account Balance [Line Items]
Policyholder contract deposits	10,439	10,258	10,300		10,286
Institutional Markets
Policyholder Account Balance [Line Items]
Policyholder contract deposits	13,742	11,718	10,969		11,559
Corporate and Other
Policyholder Account Balance [Line Items]
Policyholder contract deposits	$ 3,333	3,588	$ 3,825		4,145
As Previously Reported
Policyholder Account Balance [Line Items]
Policyholder contract deposits		$ 158,966		$ 154,892	154,892
As Previously Reported | Individual Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits					85,097
As Previously Reported | Group Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits					43,805
As Previously Reported | Life Insurance
Policyholder Account Balance [Line Items]
Policyholder contract deposits					10,286
As Previously Reported | Institutional Markets
Policyholder Account Balance [Line Items]
Policyholder contract deposits					11,559
As Previously Reported | Corporate and 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)
Policyholder Account Balance [Line Items]
Policyholder contract deposits					(6,471)
Adjustment for the reclassification of the embedded derivative liability to market risk benefits, net of the host adjustment(s) | Individual Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits					(5,894)
Adjustment for the reclassification of the embedded derivative liability to market risk benefits, net of the host adjustment(s) | Group Retirement
Policyholder Account Balance [Line Items]
Policyholder contract deposits					(577)
Adjustment for the reclassification of the embedded derivative liability to market risk benefits, net of the host adjustment(s) | 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) | 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) | Corporate and Other
Policyholder Account Balance [Line Items]
Policyholder contract deposits					$ 0