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RELATED PARTY TRANSACTIONS - Investment Management and Service Fees Related to AB (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Related Party Transaction [Line Items] |  |  |
Investment management and service fees | $ 5,263 | $ 4,820 | $ 4,891
Alliance Bernstein | Related Party | Investment Management And Related Services |  |  |
Related Party Transaction [Line Items] |  |  |
Investment management and service fees | 1,597 | 1,378 | 1,453
Distribution revenues | 711 | 576 | 591
Other revenues - shareholder servicing fees | 81 | 76 | 79
Other revenues - other | 7 | 9 | 8
Total | $ 2,396 | $ 2,039 | $ 2,131

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