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Goodwill and other identifiable intangible assets | 3 Months Ended
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Apr. 02, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and other identifiable intangible assets | Goodwill and other identifiable intangible assets Changes in goodwill during the first three months ended April 2, 2023, were as follows:
| In millions | Gas Cylinders |  | Elektron |  | Total |
| At January 1, 2023 | $ | 25.0 |  |  | $ | 40.6 |  |  | $ | 65.6 |  |
| Exchange difference | 0.6 |  |  | 0.3 |  |  | 0.9 |  |
| Net balance at April 2, 2023 | $ | 25.6 |  |  | $ | 40.9 |  |  | $ | 66.5 |  |
Accumulated goodwill impairment losses in relation to continuing activities were $8.0 million as of April 2, 2023 and December 31, 2022.. Identifiable intangible assets consisted of the following:
| In millions | Customer relationships |  | Technology and trading related |  | Total |
| Cost: |  |  |  |  |  |
| At January 1, 2023 | $ | 15.2 |  |  | $ | 7.4 |  |  | $ | 22.6 |  |
| Exchange movements | — |  |  | 0.2 |  |  | 0.2 |  |
| At April 2, 2023 | $ | 15.2 |  |  | $ | 7.6 |  |  | $ | 22.8 |  |
| Accumulated amortization: |  |  |  |  |
| At January 1, 2023 | $ | 6.1 |  |  | $ | 4.0 |  |  | $ | 10.1 |  |
| Provided during the period | 0.1 |  |  | 0.1 |  |  | 0.2 |  |
| Exchange movements | — |  |  | 0.1 |  |  | 0.1 |  |
| At April 2, 2023 | $ | 6.2 |  |  | $ | 4.2 |  |  | $ | 10.4 |  |
| Net book values: |  |  |  |  |  |
| At January 1, 2023 | $ | 9.1 |  |  | $ | 3.4 |  |  | $ | 12.5 |  |
| At April 2, 2023 | $ | 9.0 |  |  | $ | 3.4 |  |  | $ | 12.4 |  |
Identifiable intangible asset amortization expense was $0.2 million and $0.2 million for the First Quarters of 2023 and 2022 respectively. Intangible asset amortization expense during each of the following five years is expected to be approximately $0.7 million.

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- References No definition available. + Details
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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI https://asc.fasb.org/topic&trid=2144416 + Details
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