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 - INTANGIBLE ASSETS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Apr. 01, 2023	Dec. 31, 2022
Definite-lived intangible assets:
Gross Carrying Amount	$ 77.9		$ 77.9			$ 77.9
Accumulated Amortization	(62.1)		(62.1)			(60.5)
Net Carrying Amount	15.8		15.8			17.4
Aggregate Amortization Expense	0.6	$ 0.7	2.0	$ 1.9
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2023	2.5		2.5
2024	2.3		2.3
2025	2.2		2.2
2026	2.0		2.0
2027	$ 2.0		$ 2.0
Technology
Definite-lived intangible assets:
Weighted Average Life (in years)	7 years		7 years
Gross Carrying Amount	$ 9.2		$ 9.2			9.3
Accumulated Amortization	(9.1)		(9.1)			(9.2)
Net Carrying Amount	$ 0.1		$ 0.1			0.1
Customer Relationships
Definite-lived intangible assets:
Weighted Average Life (in years)	17 years		17 years
Gross Carrying Amount	$ 34.9		$ 34.9			34.8
Accumulated Amortization	(28.0)		(28.0)			(26.8)
Net Carrying Amount	$ 6.9		$ 6.9			8.0
Customer Relationships \| MARCO
Definite-lived intangible assets:
Weighted Average Life (in years)					4 years
Intangible assets aquired					$ 0.2
Land Use Rights
Definite-lived intangible assets:
Weighted Average Life (in years)	80 years		80 years
Gross Carrying Amount	$ 3.9		$ 3.9			4.0
Accumulated Amortization	(0.8)		(0.8)			(0.8)
Net Carrying Amount	$ 3.1		$ 3.1			3.2
Other
Definite-lived intangible assets:
Weighted Average Life (in years)	9 years		9 years
Gross Carrying Amount	$ 29.9		$ 29.9			29.8
Accumulated Amortization	(24.2)		(24.2)			(23.7)
Net Carrying Amount	$ 5.7		$ 5.7			$ 6.1
Trademarks \| MARCO
Definite-lived intangible assets:
Weighted Average Life (in years)					10 years
Intangible assets aquired					$ 0.3