LONG-TERM OBLIGATIONS - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Jan. 31, 2017
Debt Instrument [Line Items]
Debt Issuance Costs, Net	$ 13.9
Net debt	1,216.7
Capital lease obligations	2.7	$ 3.1
Total debt	1,219.4	984.8
Notes payable and current portion of long-term debt	(4.7)	(5.2)
Long-term debt, less current portion	$ 1,214.7	979.6
Senior Notes \| 5-5/8% Senior Notes due February 1, 2025
Debt Instrument [Line Items]
Interest rate of debt securities (as a percent)	5.625%		5.625%
Debt Issuance Costs, Net	$ 8.9	10.4
Net debt	591.1	589.6
Credit Agreement \| Credit Agreement 2017
Debt Instrument [Line Items]
Debt Issuance Costs, Net	5.0	6.1
Net debt	386.4	389.0
Other Debt Obligations
Debt Instrument [Line Items]
Net debt	$ 2.2	$ 3.1

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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