SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION (Statements of Comprehensive Income)(Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Supplemental Guarantor Financial Information Statements Of Comprehensive Income [Line Items]
Net income (loss)	$ 17.5	$ 5.9	$ (21.4)	$ 61.3
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	4.6	(1.7)	9.3	(2.8)
Unrealized gains (losses) on derivative contracts, net	2.6	(2.1)	3.8	(2.6)
Pension and postretirement liability adjustments, net	3.1	0.0	3.1	0.0
Amortization of prior service costs and actuarial losses, net	2.3	4.9	9.6	15.3
Other comprehensive income	12.6	1.1	25.8	9.9
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	30.1	7.0	4.4	71.2
Parent Guarantor
Supplemental Guarantor Financial Information Statements Of Comprehensive Income [Line Items]
Net income (loss)	17.5	5.9	(21.4)	61.3
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	0.0	0.0	0.0	0.0
Unrealized gains (losses) on derivative contracts, net	2.6	(2.1)	3.8	(2.6)
Pension and postretirement liability adjustments, net	3.1		3.1
Amortization of prior service costs and actuarial losses, net	1.9	4.7	8.6	14.4
Other comprehensive income	7.6	2.6	15.5	11.8
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	25.1	8.5	(5.9)	73.1
Issuer
Supplemental Guarantor Financial Information Statements Of Comprehensive Income [Line Items]
Net income (loss)	10.0	0.0	21.5	0.0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	0.0	0.0	0.0	0.0
Unrealized gains (losses) on derivative contracts, net	0.0	0.0	0.0	0.0
Pension and postretirement liability adjustments, net	0.0		0.0
Amortization of prior service costs and actuarial losses, net	0.0	0.0	0.0	0.0
Other comprehensive income	0.0	0.0	0.0	0.0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	10.0	0.0	21.5	0.0
Subsidiary Non-Guarantor
Supplemental Guarantor Financial Information Statements Of Comprehensive Income [Line Items]
Net income (loss)	40.5	21.4	67.1	82.8
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	4.6	(1.7)	9.3	(2.8)
Unrealized gains (losses) on derivative contracts, net	0.0	0.0	0.0	0.0
Pension and postretirement liability adjustments, net	0.0		0.0
Amortization of prior service costs and actuarial losses, net	0.4	0.2	1.0	0.9
Other comprehensive income	5.0	(1.5)	10.3	(1.9)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	45.5	19.9	77.4	80.9
Eliminations
Supplemental Guarantor Financial Information Statements Of Comprehensive Income [Line Items]
Net income (loss)	(50.5)	(21.4)	(88.6)	(82.8)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	0.0	0.0	0.0	0.0
Unrealized gains (losses) on derivative contracts, net	0.0	0.0	0.0	0.0
Pension and postretirement liability adjustments, net	0.0		0.0
Amortization of prior service costs and actuarial losses, net	0.0	0.0	0.0	0.0
Other comprehensive income	0.0	0.0	0.0	0.0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (50.5)	$ (21.4)	$ (88.6)	$ (82.8)