DISPOSITIONS AND SPECIAL CHARGES - Special Charges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
North American Technology Products Segment and European Technology Products Segment
Restructuring Reserve [Roll Forward]
Balance beginning of period	$ 20.5	$ 19.3
Charged to expense	6.8	19.0
Paid or otherwise settled	(7.1)	(17.8)
Balance end of period	20.2	20.5
ETG - Severance and other costs | ETG
Restructuring Reserve [Roll Forward]
Balance beginning of period	0.0	0.3
Charged to expense	0.3	0.0
Paid or otherwise settled	(0.3)	(0.3)
Balance end of period	0.0	0.0
ETG – Lease liabilities and other costs | ETG
Restructuring Reserve [Roll Forward]
Balance beginning of period	1.2	0.0
Charged to expense	0.0	1.9
Paid or otherwise settled	0.0	(0.7)
Balance end of period	1.2	1.2
NATG – Workforce reductions | NATG
Restructuring Reserve [Roll Forward]
Balance beginning of period	0.0	2.7
Charged to expense	0.0	0.2
Paid or otherwise settled	0.0	(2.9)
Balance end of period	0.0	0.0
NATG – Lease liabilities and other exit costs | NATG
Restructuring Reserve [Roll Forward]
Balance beginning of period	19.3	16.3
Charged to expense	6.5	16.9
Paid or otherwise settled	(6.8)	(13.9)
Balance end of period	$ 19.0	$ 19.3