ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	$ 424.2
Balance, beginning of period PY		$ (444.1)
Balance, end of period	261.7
Balance, end of period PY		(484.8)
Changes in Pension and Other Post-Retirement Benefits, net of tax [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(281.1)
Balance, beginning of period PY		(263.9)
Other comprehensive income (loss) before reclassifications	0.2	0.5
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	5.5	6.2
Balance, end of period	(275.4)
Balance, end of period PY		(257.2)
Unrealized Net Gain (Loss) on Foreign Currency Translation [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period PY		225.4
Other comprehensive income (loss) before reclassifications		0.7
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		0.0
Balance, end of period PY		226.1
Net Unrealized Gain (Loss) on Derivative Financial Instruments, net of tax [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2.8)
Balance, beginning of period PY		(0.5)
Other comprehensive income (loss) before reclassifications	2.5	0.4
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.2	(0.1)
Balance, end of period	(0.1)
Balance, end of period PY		(0.2)
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(283.9)
Balance, beginning of period PY		(39.0)
Other comprehensive income (loss) before reclassifications	2.7	1.6
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	5.7	6.1
Balance, end of period	$ (275.5)
Balance, end of period PY		$ (31.3)