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)