INVESTMENTS (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments in and Advances to Affiliates [Abstract]
Equity method investments gain (loss)	$ 8.9	$ 11.1	$ 1.8	$ 45.6

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

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