The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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GOODWILL AND INTANGIBLE ASSETS, NET GOODWILL AND INTANGIBLE ASSETS, NET - INTANGIBLE ASSETS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Definite-lived intangible assets:
Gross Carrying Amount	$ 63.8		$ 63.8		$ 64.6
Accumulated Amortization	(53.8)		(53.8)		(53.2)
Net Carrying Amount	10.0		10.0		11.4
Aggregate Amortization Expense	0.4	$ 0.4	1.3	$ 1.4
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2019	1.8		1.8
2020	1.7		1.7
2021	1.6		1.6
2022	1.4		1.4
2023	0.9		$ 0.9
Technology
Definite-lived intangible assets:
Weighted Average Life (in years)			7 years
Gross Carrying Amount	9.1		$ 9.1		9.7
Accumulated Amortization	(8.6)		(8.6)		(9.1)
Net Carrying Amount	0.5		$ 0.5		0.6
Customer Relationships
Definite-lived intangible assets:
Weighted Average Life (in years)			22 years
Gross Carrying Amount	25.4		$ 25.4		25.6
Accumulated Amortization	(22.4)		(22.4)		(21.7)
Net Carrying Amount	3.0		$ 3.0		3.9
Land Use Rights
Definite-lived intangible assets:
Weighted Average Life (in years)			82 years
Gross Carrying Amount	4.3		$ 4.3		4.4
Accumulated Amortization	(0.6)		(0.6)		(0.6)
Net Carrying Amount	3.7		$ 3.7		3.8
Other
Definite-lived intangible assets:
Weighted Average Life (in years)			8 years
Gross Carrying Amount	25.0		$ 25.0		24.9
Accumulated Amortization	(22.2)		(22.2)		(21.8)
Net Carrying Amount	$ 2.8		$ 2.8		$ 3.1