LEASES - Balance Sheet Implication (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jan. 01, 2019
Assets
Operating right-of-use assets	$ 172.3	$ 187.5
Finance right-of-use assets	2.5	3.2
Total right-of-use assets	174.8	190.7
Current
Operating lease liabilities	43.9	45.4
Finance lease liabilities	1.0	1.1
Total current lease liabilities	44.9	46.5
Noncurrent
Operating lease liabilities	141.7	155.9
Finance lease liabilities	1.5	1.9
Total noncurrent lease liabilities	143.2	157.8
Total lease liability	$ 188.1	$ 204.3