Investments (Fixed Maturity Securities by Sector) - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, non-income producing	$ 80,085	$ 74,757
Non-Income Producing
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, non-income producing	$ 52	$ 0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details