SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION (Statements of Operations)(Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 71 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Supplemental Guarantor Financial Information Statement of Operations [Line Items]                  
Sales $ 1,452.7     $ 533.6     $ 4,164.9 $ 1,587.0  
Cost of goods sold 1,284.4     460.0     3,696.7 1,338.7  
Selling and administration 82.0     35.8     249.4 122.7  
Restructuring charges 5.2 $ 8.2 $ 92.8 0.3 $ 0.7 $ 1.2 106.2 2.2 $ 142.9
Acquisition-related costs 13.1     14.5     39.6 35.4  
Other operating (expense) income (0.2)     (0.1)     10.5 42.1  
Operating income (loss) 67.8     22.9     83.5 130.1  
Earnings of non-consolidated affiliates 0.5     0.5     1.1 1.3  
Equity (loss) income in subsidiaries 0.0     0.0     0.0 0.0  
Interest Expense 47.5     14.4     143.6 39.7  
Interest income 0.5     0.3     1.3 0.9  
Income (loss) before taxes 21.3     9.3     (57.7) 92.6  
Income tax provision (benefit) 3.8     3.4     (36.3) 31.3  
Net income (loss) 17.5     5.9     (21.4) 61.3  
Parent Guarantor                  
Supplemental Guarantor Financial Information Statement of Operations [Line Items]                  
Sales 359.1     330.8     1,009.6 987.7  
Cost of goods sold 300.6     294.5     861.3 861.5  
Selling and administration 33.4     29.4     106.2 88.0  
Restructuring charges 0.2     0.2     0.8 0.5  
Acquisition-related costs 14.3     14.5     39.6 35.4  
Other operating (expense) income (0.6)     (0.4)     (1.7) (1.6)  
Operating income (loss) 10.0     (8.2)     0.0 0.7  
Earnings of non-consolidated affiliates 0.5     0.5     1.1 1.3  
Equity (loss) income in subsidiaries 15.0     21.4     (6.2) 82.8  
Interest Expense 9.6     14.6     30.6 40.9  
Interest income 0.8     0.7     2.3 2.4  
Income (loss) before taxes 16.7     (0.2)     (33.4) 46.3  
Income tax provision (benefit) (0.8)     (6.1)     (12.0) (15.0)  
Net income (loss) 17.5     5.9     (21.4) 61.3  
Issuer                  
Supplemental Guarantor Financial Information Statement of Operations [Line Items]                  
Sales 0.0     0.0     0.0 0.0  
Cost of goods sold 0.0     0.0     0.0 0.0  
Selling and administration 0.0     0.0     0.0 0.0  
Restructuring charges 0.0     0.0     0.0 0.0  
Acquisition-related costs 0.0     0.0     0.0 0.0  
Other operating (expense) income 0.0     0.0     0.0 0.0  
Operating income (loss) 0.0     0.0     0.0 0.0  
Earnings of non-consolidated affiliates 0.0     0.0     0.0 0.0  
Equity (loss) income in subsidiaries 35.5     0.0     94.8 0.0  
Interest Expense 38.0     0.0     114.0 0.0  
Interest income 0.0     0.0     0.0 0.0  
Income (loss) before taxes (2.5)     0.0     (19.2) 0.0  
Income tax provision (benefit) (12.5)     0.0     (40.7) 0.0  
Net income (loss) 10.0     0.0     21.5 0.0  
Subsidiary Non-Guarantor                  
Supplemental Guarantor Financial Information Statement of Operations [Line Items]                  
Sales 1,249.3     317.7     3,545.3 921.7  
Cost of goods sold 1,139.5     280.4     3,225.4 799.6  
Selling and administration 48.6     6.4     143.2 34.7  
Restructuring charges 5.0     0.1     105.4 1.7  
Acquisition-related costs (1.2)     0.0     0.0 0.0  
Other operating (expense) income 0.4     0.3     12.2 43.7  
Operating income (loss) 57.8     31.1     83.5 129.4  
Earnings of non-consolidated affiliates 0.0     0.0     0.0 0.0  
Equity (loss) income in subsidiaries 0.0     0.0     0.0 0.0  
Interest Expense 1.3     1.1     3.2 2.8  
Interest income 1.1     0.9     3.2 2.5  
Income (loss) before taxes 57.6     30.9     83.5 129.1  
Income tax provision (benefit) 17.1     9.5     16.4 46.3  
Net income (loss) 40.5     21.4     67.1 82.8  
Eliminations                  
Supplemental Guarantor Financial Information Statement of Operations [Line Items]                  
Sales (155.7)     (114.9)     (390.0) (322.4)  
Cost of goods sold (155.7)     (114.9)     (390.0) (322.4)  
Selling and administration 0.0     0.0     0.0 0.0  
Restructuring charges 0.0     0.0     0.0 0.0  
Acquisition-related costs 0.0     0.0     0.0 0.0  
Other operating (expense) income 0.0     0.0     0.0 0.0  
Operating income (loss) 0.0     0.0     0.0 0.0  
Earnings of non-consolidated affiliates 0.0     0.0     0.0 0.0  
Equity (loss) income in subsidiaries (50.5)     (21.4)     (88.6) (82.8)  
Interest Expense (1.4)     (1.3)     (4.2) (4.0)  
Interest income (1.4)     (1.3)     (4.2) (4.0)  
Income (loss) before taxes (50.5)     (21.4)     (88.6) (82.8)  
Income tax provision (benefit) 0.0     0.0     0.0 0.0  
Net income (loss) $ (50.5)     $ (21.4)     $ (88.6) $ (82.8)