LEASES - Supplemental Cash Flow (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Leases [Abstract]
Operating cash flows from operating leases	$ 18.3
Operating cash flows from finance leases	0.1
Financing cash flows from finance leases	1.5	$ 0.0
Right-of-use assets obtained in exchange for new operating lease liabilities	31.8
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 1.5