COMPREHENSIVE INCOME (LOSS) - RECLASSIFICATION OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Reclassification of Acuumulated Other Comprehensive Income [Line Items]
Interest expense	$ (8.0)		$ (9.6)		$ (16.4)	$ (18.2)
Cost of products sold	(468.6)		(489.3)		(915.1)	(931.3)
Other expense (income), net	(12.1)		1.0		1.7	35.1
Net loss before tax	47.6		(1,162.3)		101.4	(1,067.5)
Tax impact	(11.2)		41.3		(25.8)	27.6
Net income (loss)	36.4	$ 39.2	(1,121.0)	$ 81.1	75.6	(1,039.9)
Amortization of prior service benefits
Reclassification of Acuumulated Other Comprehensive Income [Line Items]
Other expense (income), net	0.2		0.0		0.1	0.0
Reclassification out of Accumulated Other Comprehensive Income
Reclassification of Acuumulated Other Comprehensive Income [Line Items]
Net income (loss)	(3.0)		35.5		(1.9)	(5.3)
Reclassification out of Accumulated Other Comprehensive Income | Loss on derivative financial instruments
Reclassification of Acuumulated Other Comprehensive Income [Line Items]
Net loss before tax	(1.2)		(7.2)		(1.0)	(4.8)
Tax impact	0.0		0.8		0.0	0.7
Net income (loss)	(1.2)		(6.4)		(1.0)	(4.1)
Reclassification out of Accumulated Other Comprehensive Income | Loss on derivative financial instruments | Interest rate swaps
Reclassification of Acuumulated Other Comprehensive Income [Line Items]
Interest expense	(1.1)		(1.1)		(0.5)	(0.5)
Reclassification out of Accumulated Other Comprehensive Income | Loss on derivative financial instruments | Foreign exchange forward contracts
Reclassification of Acuumulated Other Comprehensive Income [Line Items]
Cost of products sold	(0.1)		(6.1)		(0.5)	(4.3)
Reclassification out of Accumulated Other Comprehensive Income | Net unrealized holding gain (loss) on available-for-sale securities
Reclassification of Acuumulated Other Comprehensive Income [Line Items]
Other expense (income), net	0.0		45.0
Tax impact	0.0		(0.7)
Net income (loss)	0.0		44.3
Reclassification out of Accumulated Other Comprehensive Income | Pension Liability Gain (Loss)
Reclassification of Acuumulated Other Comprehensive Income [Line Items]
Net loss before tax	(2.5)		(3.4)		(1.2)	(1.7)
Tax impact	0.7		1.0		0.3	0.5
Net income (loss)	(1.8)		(2.4)		(0.9)	(1.2)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of net actuarial losses
Reclassification of Acuumulated Other Comprehensive Income [Line Items]
Other expense (income), net	$ (2.7)		$ (3.4)		$ (1.3)	$ (1.7)