REVENUE - Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at December 31, 2019	$ 4.0
Accounts Receivable, Credit Loss Expense (Reversal)	0.6
Accounts Receivable, Credit Loss Expense, Other	0.2
Balance at March 31, 2020	$ 4.0	$ 4.8