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Investments in Affiliates and Affiliate Sponsored Investment Products - Affiliated Sponsored Investment Products (Details) - Variable Interest Entity, Primary Beneficiary - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
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Variable Interest Entities |  |
Unconsolidated VIE Net Assets | $ 5,132.1 | $ 4,878.6
Carrying Value and Maximum Exposure to Loss | $ 16.0 | $ 15.3

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