LEASES Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 9.0	$ 17.2
Impairment of operating lease ROU assets	0.2	0.3
Total operating lease cost	9.2	17.5
Finance lease ROU asset amortization	0.4	0.8
Finance lease interest expense	0.0	0.1
Total finance lease cost	0.4	0.9
Variable lease cost	0.7	1.2
Short-term lease cost	0.0	0.1
Total lease cost	$ 10.3	$ 19.7