LEASES Lease Cost (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 8.2
Impairment of operating lease ROU assets	0.1
Finance lease amortization of ROU assets	0.4
Finance lease interest expense	0.1
Total finance lease cost	0.5
Variable lease cost	0.5
Short-term lease cost	0.1
Total lease cost	$ 9.4