Investments (excluding Consolidated Investment Entities) - Proceeds and Realized Gains and Losses from the Sale of Fixed Maturities (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Proceeds on sales	$ 5,393	$ 5,448	$ 12,198
Gross gains	69	100	1,769
Gross losses	$ 78	$ 109	$ 9

Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-9

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- Definition

Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Available for Sale Securities, Gross Realized Gains (Losses), Proceeds on Sales

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