LEASES - Schedule of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Amortization of finance lease asset	$ 1.0	$ 2.0
Interest on lease liabilities	1.0	3.0
Total finance lease expense	2.0	5.0
Operating lease expense	12.0	32.0
Total lease expense	14.0	37.0
Variable lease expense	1.0	4.0
Short term lease expense	$ 0.4	$ 1.0