Investments (excluding Consolidated Investment Entities) - Proceeds and Gross Gains/(Losses) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Proceeds on sales	$ 617	$ 2,331	$ 1,446	$ 3,637
Gross gains	8	23	19	43
Gross losses	$ 9	$ 30	$ 36	$ 55

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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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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- Definition

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

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