ALLOWANCE FOR DOUBTFUL ACCOUNTS AND CUSTOMER DISPUTES (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2020	Jun. 30, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance, December 31, 2019	$ 4.0	$ 4.0
Provision for doubtful accounts and customer disputes		1.0
Uncollectible receivables written off, net of recoveries		(1.9)
Other adjustments		(0.5)
Balance, June 30, 2020		$ 7.1
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member
Cumulative effect of the adoption of ASC 326
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance, December 31, 2019	$ 4.5	$ 4.5
Balance, January 1, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance, December 31, 2019	$ 8.5	$ 8.5