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INVESTMENTS - Schedule of Investments in Unconsolidated Affiliates (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Equity method investments      
Carrying value of equity method investments $ 33.6 $ 21.4  
Equity securities      
Carrying value of non-marketable equity securities 87.6 86.9 $ 39.3
Total investments in unconsolidated entities $ 121.2 $ 108.3