SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION (Statements of Operations)(Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended			98 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Supplemental Guarantor Financial Information Statement of Operations [Line Items]
Sales	$ 1,635.0	$ 1,872.4	$ 1,728.4	$ 1,710.3	$ 1,619.9	$ 1,554.9	$ 1,526.5	$ 1,567.1	$ 6,946.1	$ 6,268.4	$ 5,550.6
Cost of goods sold	1,391.0	1,441.7	1,460.7	1,528.7	1,400.2	1,349.3	1,407.9	1,397.5	5,822.1	5,554.9	4,944.5
Selling and administration									430.6	369.8	347.2
Restructuring charges									21.9	37.6	112.9	$ 209.1
Acquisition-related costs									1.0	12.8	48.8
Other operating (loss) income									6.4	3.3	10.6
Operating income (loss)									(676.9)	(296.6)	(107.8)
Earnings (losses) of non-consolidated affiliates									(19.7)	1.8	1.7
Equity income in subsidiaries									0.0	0.0	0.0
Interest expense									243.2	217.4	191.9
Interest income									1.6	1.8	3.4
Non-operating pension income (expense)									21.7	34.4	44.8
Income (loss) before taxes									437.3	117.2	(34.2)
Income tax (benefit) provision									109.4	(432.3)	(30.3)
Net income (loss)	$ 53.3	$ 195.1	$ 58.6	$ 20.9	$ 489.3	$ 52.7	$ (5.9)	$ 13.4	327.9	549.5	(3.9)
Parent Guarantor
Supplemental Guarantor Financial Information Statement of Operations [Line Items]
Sales									1,423.8	1,330.3	1,321.3
Cost of goods sold									1,153.1	1,195.5	1,153.0
Selling and administration									206.0	157.0	162.1
Restructuring charges									0.0	1.7	0.8
Acquisition-related costs									1.0	12.8	47.4
Other operating (loss) income									(3.0)	(11.1)	(2.2)
Operating income (loss)									(60.7)	47.8	44.2
Earnings (losses) of non-consolidated affiliates									(19.7)	1.8	1.7
Equity income in subsidiaries									310.7	638.4	16.2
Interest expense									68.6	44.5	38.8
Interest income									5.8	6.3	4.7
Non-operating pension income (expense)									26.6	38.5	48.3
Income (loss) before taxes									315.5	592.7	(12.1)
Income tax (benefit) provision									(12.4)	43.2	(8.2)
Net income (loss)									327.9	549.5	(3.9)
Issuer
Supplemental Guarantor Financial Information Statement of Operations [Line Items]
Sales									0.0	0.0	0.0
Cost of goods sold									0.0	0.0	0.0
Selling and administration									0.0	0.0	0.0
Restructuring charges									0.0	0.0	0.0
Acquisition-related costs									0.0	0.0	0.0
Other operating (loss) income									0.0	0.0	0.0
Operating income (loss)									0.0	0.0	0.0
Earnings (losses) of non-consolidated affiliates									0.0	0.0	0.0
Equity income in subsidiaries									289.6	357.6	139.0
Interest expense									153.3	165.8	153.9
Interest income									0.0	0.0	0.0
Non-operating pension income (expense)									0.0	0.0	0.0
Income (loss) before taxes									136.3	191.8	(14.9)
Income tax (benefit) provision									(35.1)	(310.0)	(57.6)
Net income (loss)									171.4	501.8	42.7
Subsidiary Non-Guarantor
Supplemental Guarantor Financial Information Statement of Operations [Line Items]
Sales									5,937.0	5,344.9	4,720.2
Cost of goods sold									5,083.7	4,766.2	4,282.4
Selling and administration									224.6	212.8	185.1
Restructuring charges									21.9	35.9	112.1
Acquisition-related costs									0.0	0.0	1.4
Other operating (loss) income									9.4	14.4	12.8
Operating income (loss)									(616.2)	(344.4)	(152.0)
Earnings (losses) of non-consolidated affiliates									0.0	0.0	0.0
Equity income in subsidiaries									0.0	0.0	0.0
Interest expense									26.9	13.0	4.7
Interest income									1.4	1.4	4.2
Non-operating pension income (expense)									(4.9)	(4.1)	(3.5)
Income (loss) before taxes									585.8	328.7	148.0
Income tax (benefit) provision									156.9	(165.5)	35.5
Net income (loss)									428.9	494.2	112.5
Eliminations
Supplemental Guarantor Financial Information Statement of Operations [Line Items]
Sales									(414.7)	(406.8)	(490.9)
Cost of goods sold									(414.7)	(406.8)	(490.9)
Selling and administration									0.0	0.0	0.0
Restructuring charges									0.0	0.0	0.0
Acquisition-related costs									0.0	0.0	0.0
Other operating (loss) income									0.0	0.0	0.0
Operating income (loss)									0.0	0.0	0.0
Earnings (losses) of non-consolidated affiliates									0.0	0.0	0.0
Equity income in subsidiaries									(600.3)	(996.0)	(155.2)
Interest expense									(5.6)	(5.9)	(5.5)
Interest income									(5.6)	(5.9)	(5.5)
Non-operating pension income (expense)									0.0	0.0	0.0
Income (loss) before taxes									(600.3)	(996.0)	(155.2)
Income tax (benefit) provision									0.0	0.0	0.0
Net income (loss)									$ (600.3)	$ (996.0)	$ (155.2)