INVESTMENTS - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments in and Advances to Affiliates [Abstract]
Equity method investments gains	$ 114.9	$ 22.5	$ 57.4

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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