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Goodwill and other identifiable intangible assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Changes in goodwill during the years ended December 31, 2020 and 2019 were as follows:

			In millions			Gas Cylinders						Elektron						Total
			At January 1, 2019			$	26.3					$	41.3					$	67.6
			Exchange difference			0.7						0.5						1.2
			At December 31, 2019			$	27.0					$	41.8					$	68.8
			Exchange difference			0.9						0.5						1.4
			Net balance at December 31, 2020			$	27.9					$	42.3					$	70.2

Schedule of Intangible Assets

Identifiable intangible assets consisted of the following:

						December 31, 2020																		December 31, 2019
			In millions			Gross						Accumulated amortization						Net						Gross						Accumulated amortization						Net
			Customer relationships			$	13.4					$	(5.2)					$	8.2					$	13.4					$	(4.6)					$	8.8
			Technology and trading related			8.3						(3.7)						4.6						8.1						(3.3)						4.8
						$	21.7					$	(8.9)					$	12.8					$	21.5					$	(7.9)					$	13.6

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- References

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- Definition

Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
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- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267

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