Separate Accounts - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Schedule Of Fees Charged To Separate Accounts [Line Items]
Separate account assets	$ 144,634	$ 146,038
Pass Through Separate Accounts
Schedule Of Fees Charged To Separate Accounts [Line Items]
Separate account assets	115,600	108,900
Separate Accounts With Minimum Return Or Account Value
Schedule Of Fees Charged To Separate Accounts [Line Items]
Separate account assets	$ 29,000	$ 37,100
Funding Agreements and Participating Close Out Contracts Included in Separate Accounts with a Guaranteed Minimum Return or Account Value
Schedule Of Fees Charged To Separate Accounts [Line Items]
Average interest rate credited on separate accounts with a guaranteed minimum return or account value	2.60%	2.50%