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, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jul. 29, 2022	Apr. 22, 2022	Dec. 31, 2021
Definite-lived intangible assets:
Gross Carrying Amount	$ 75.8		$ 75.8				$ 72.4
Accumulated Amortization	(58.3)		(58.3)				(59.0)
Net Carrying Amount	17.5		17.5				13.4
Aggregate Amortization Expense	0.7	$ 0.7	1.9	$ 1.6
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2022	2.7		2.7
2023	2.6		2.6
2024	2.4		2.4
2025	2.2		2.2
2026	2.0		$ 2.0
Technology
Definite-lived intangible assets:
Weighted Average Life (in years)			7 years
Gross Carrying Amount	8.6		$ 8.6				9.8
Accumulated Amortization	(8.5)		(8.5)				(9.7)
Net Carrying Amount	0.1		$ 0.1				0.1
Customer Relationships
Definite-lived intangible assets:
Weighted Average Life (in years)			20 years
Gross Carrying Amount	33.9		$ 33.9				31.9
Accumulated Amortization	(25.9)		(25.9)				(25.4)
Net Carrying Amount	8.0		$ 8.0				6.5
Customer Relationships \| Steelweld
Definite-lived intangible assets:
Weighted Average Life (in years)			3 years
Intangible assets aquired						$ 0.6
Customer Relationships \| ProAll International Mfg. Inc and ProAll UK Limited
Definite-lived intangible assets:
Weighted Average Life (in years)			9 years
Intangible assets aquired					$ 3.2
Land Use Rights
Definite-lived intangible assets:
Weighted Average Life (in years)			80 years
Gross Carrying Amount	4.0		$ 4.0				4.4
Accumulated Amortization	(0.8)		(0.8)				(0.8)
Net Carrying Amount	3.2		$ 3.2				3.6
Other
Definite-lived intangible assets:
Weighted Average Life (in years)			7 years
Gross Carrying Amount	29.3		$ 29.3				26.3
Accumulated Amortization	(23.1)		(23.1)				(23.1)
Net Carrying Amount	$ 6.2		$ 6.2				$ 3.2
Trademarks \| ProAll International Mfg. Inc and ProAll UK Limited
Definite-lived intangible assets:
Weighted Average Life (in years)			10 years
Intangible assets aquired					$ 3.7