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INVESTMENTS - Deconsolidation Impacts on Financial Statements (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Gains recognized upon deconsolidation | $ 504.1 | $ (425.5) | $ 284.6
Currency translation adjustments | Reclassification out of accumulated other comprehensive income |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Gains recognized upon deconsolidation | 0.0 | 3.0 | 2.4
Assets |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Net decrease in assets, liabilities, and redeemable noncontrolling interest | (663.8) | (256.9) | (753.0)
Liability |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Net decrease in assets, liabilities, and redeemable noncontrolling interest | (29.7) | (12.8) | (17.6)
Redeemable non-controlling interest |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Net decrease in assets, liabilities, and redeemable noncontrolling interest | $ (479.2) | $ (147.2) | $ (501.1)

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