LEASES - Balance Sheet Implication (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jan. 01, 2019
Leases [Abstract]
Operating right-of-use assets	$ 174.9	$ 187.5
Finance right-of-use assets	3.0	3.2
Total right-of-use assets	177.9	190.7
Operating lease liabilities	43.8	45.4
Finance lease liabilities	1.2	1.1
Total current lease liabilities	45.0	46.5
Operating lease liabilities	144.8	155.9
Finance lease liabilities	1.8	1.9
Total noncurrent lease liabilities	146.6	157.8
Total lease liability	$ 191.6	$ 204.3