GOODWILL AND INTANGIBLE ASSETS, NET GOODWILL AND INTANGIBLE ASSETS, NET - INTANGIBLE ASSETS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Definite-lived intangible assets:
Gross Carrying Amount	$ 82.8		$ 82.8		$ 83.8
Accumulated Amortization	(68.6)		(68.6)		(65.4)
Net Carrying Amount	14.2		14.2		18.4
Aggregate Amortization Expense	0.5	$ 0.7	1.5	$ 2.1
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2017	2.0		2.0
2018	1.8		1.8
2019	1.7		1.7
2020	1.7		1.7
2021	1.6		$ 1.6
Technology
Definite-lived intangible assets:
Weighted Average Life (in years)			7 years
Gross Carrying Amount	18.6		$ 18.6		17.0
Accumulated Amortization	(17.5)		(17.5)		(15.7)
Net Carrying Amount	1.1		$ 1.1		1.3
Customer Relationships
Definite-lived intangible assets:
Weighted Average Life (in years)			20 years
Gross Carrying Amount	33.0		$ 33.0		33.1
Accumulated Amortization	(26.0)		(26.0)		(25.2)
Net Carrying Amount	7.0		$ 7.0		7.9
Land Use Rights
Definite-lived intangible assets:
Weighted Average Life (in years)			82 years
Gross Carrying Amount	4.7		$ 4.7		7.9
Accumulated Amortization	(0.6)		(0.6)		(0.9)
Net Carrying Amount	4.1		$ 4.1		7.0
Other
Definite-lived intangible assets:
Weighted Average Life (in years)			8 years
Gross Carrying Amount	26.5		$ 26.5		25.8
Accumulated Amortization	(24.5)		(24.5)		(23.6)
Net Carrying Amount	$ 2.0		$ 2.0		$ 2.2