SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION (Cash Flows)(Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Supplemental Guarantor Financial Information Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	$ 99.9	$ 47.0
Payments to Acquire Property, Plant, and Equipment	(83.0)	(76.1)
Proceeds from disposition of property, plant and equipment	0.0	0.1
Proceeds from Contributions from Affiliates		2.2
Net Cash Provided by (Used in) Investing Activities	(83.0)	(73.8)
Proceeds from Issuance of Long-term Debt	1,875.0	0.0
Long-term debt repayments	(1,872.7)	(17.1)
Stock options exercised	8.8	0.0
Payments of Dividends	(33.1)	(33.0)
Debt issuance costs	11.2	0.0
Intercompany Financing Activities	0.0
Net Cash Provided by (Used in) Financing Activities	(33.2)	(50.1)
Effect of exchange rate changes on cash and cash equivalents	0.3	0.5
Cash and Cash Equivalents, Period Increase (Decrease)	(16.0)	(76.4)
Cash and cash equivalents, end of period	168.5	315.6
Parent Guarantor
Supplemental Guarantor Financial Information Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	59.6	(35.5)
Payments to Acquire Property, Plant, and Equipment	(24.1)	(16.2)
Proceeds from disposition of property, plant and equipment		0.0
Proceeds from Contributions from Affiliates		2.2
Net Cash Provided by (Used in) Investing Activities	(24.1)	(14.0)
Proceeds from Issuance of Long-term Debt	500.0
Long-term debt repayments	(590.2)	(0.2)
Stock options exercised	8.8
Payments of Dividends	(33.1)	(33.0)
Debt issuance costs	8.3	(16.9)
Intercompany Financing Activities	89.6
Net Cash Provided by (Used in) Financing Activities	(33.2)	(50.1)
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Cash and Cash Equivalents, Period Increase (Decrease)	2.3	(99.6)
Cash and cash equivalents, end of period	27.5	19.8
Issuer
Supplemental Guarantor Financial Information Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	0.0	0.0
Payments to Acquire Property, Plant, and Equipment	0.0	0.0
Proceeds from disposition of property, plant and equipment		0.0
Proceeds from Contributions from Affiliates		0.0
Net Cash Provided by (Used in) Investing Activities	0.0	0.0
Proceeds from Issuance of Long-term Debt	1,375.0
Long-term debt repayments	(1,282.5)	(16.9)
Stock options exercised	0.0
Payments of Dividends	0.0	0.0
Debt issuance costs	2.9	16.9
Intercompany Financing Activities	(89.6)
Net Cash Provided by (Used in) Financing Activities	0.0	0.0
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Cash and Cash Equivalents, Period Increase (Decrease)	0.0	0.0
Cash and cash equivalents, end of period	0.0	0.0
Subsidiary Non-Guarantor
Supplemental Guarantor Financial Information Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	40.3	82.5
Payments to Acquire Property, Plant, and Equipment	(58.9)	(59.9)
Proceeds from disposition of property, plant and equipment		0.1
Proceeds from Contributions from Affiliates		0.0
Net Cash Provided by (Used in) Investing Activities	(58.9)	(59.8)
Proceeds from Issuance of Long-term Debt	0.0
Long-term debt repayments	0.0	0.0
Stock options exercised	0.0
Payments of Dividends	0.0	0.0
Debt issuance costs	0.0	0.0
Intercompany Financing Activities	0.0
Net Cash Provided by (Used in) Financing Activities	0.0	0.0
Effect of exchange rate changes on cash and cash equivalents	0.3	0.5
Cash and Cash Equivalents, Period Increase (Decrease)	(18.3)	23.2
Cash and cash equivalents, end of period	141.0	295.8
Eliminations
Supplemental Guarantor Financial Information Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	0.0	0.0
Payments to Acquire Property, Plant, and Equipment	0.0	0.0
Proceeds from disposition of property, plant and equipment		0.0
Proceeds from Contributions from Affiliates		0.0
Net Cash Provided by (Used in) Investing Activities	0.0	0.0
Proceeds from Issuance of Long-term Debt	0.0
Long-term debt repayments	0.0	0.0
Stock options exercised	0.0
Payments of Dividends	0.0	0.0
Debt issuance costs	0.0	0.0
Intercompany Financing Activities	0.0
Net Cash Provided by (Used in) Financing Activities	0.0	0.0
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Cash and Cash Equivalents, Period Increase (Decrease)	0.0	0.0
Cash and cash equivalents, end of period	$ 0.0	$ 0.0