LEASES - Balance Sheet Implication (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Operating right-of-use assets	$ 180.3	$ 187.5
Finance right-of-use assets	3.2	3.2
Total right-of-use assets	183.5	190.7
Operating lease liabilities	43.9	45.4
Finance lease liabilities	1.2	1.1
Total current lease liabilities	45.1	46.5
Operating lease liabilities	150.4	155.9
Finance lease liabilities	2.0	1.9
Total noncurrent lease liabilities	152.4	157.8
Total lease liability	$ 197.5	$ 204.3