INCOME TAXES - net (Details) - USD ($) $ in Millions	3 Months Ended	36 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest [Abstract]
Cumulative income before income taxes	$ (11.7)	$ (54.8)	$ 391.2

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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