ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	$ 2.5			$ 0.2			$ 4.1	$ 7.0
Pension settlement charge	9.8			0.6			10.4	5.2
Income before income tax expense	(23.5)			(27.5)			(76.9)	(66.2)
Tax benefit	6.0			7.2			19.8	17.5
Net earnings	(17.5)	$ (21.7)	$ (18.0)	(20.3)	$ (13.1)	$ (15.3)	(57.1)	(48.7)
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Defined Benefit Plans Adjustment, Net Prior Service
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	(0.1)			(0.2)			(0.5)	(0.5)
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	(0.1)			(0.1)			(0.4)	(0.7)
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Defined Benefit Plans Adjustment, Pension Settlement Charge
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pension settlement charge	9.8			0.6			10.4	5.2
Reclassification out of Accumulated Other Comprehensive Income | Pension and Other Post-Employment Liability Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income tax expense	9.8			0.5			10.3	5.4
Tax benefit	(2.7)			(0.2)			(2.7)	(1.4)
Net earnings	$ 7.1			$ 0.3			$ 7.6	$ 4.0