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Goodwill and other identifiable intangible assets (Tables) | 3 Months Ended
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Mar. 29, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | Changes in goodwill during the First Quarter, ended March 29, 2020, were as follows:
| In millions | Gas Cylinders |  | Elektron |  | Total |
| At January 1, 2020 | $ | 27.0 |  |  | $ | 41.8 |  |  | $ | 68.8 |  |
| Exchange difference | (1.6 | ) |  | (1.0 | ) |  | (2.6 | ) |
| Balance at March 29, 2020 | $ | 25.4 |  |  | $ | 40.8 |  |  | $ | 66.2 |  |
Schedule of Intangible Assets | Identifiable intangible assets consisted of the following:
|  | March 29, 2020 |  | December 31, 2019 |
| In millions | Gross |  | Accumulated amortization |  | Net |  | Gross |  | Accumulated amortization |  | Net |
| Customer relationships | $ | 13.4 |  |  | $ | (4.8 | ) |  | $ | 8.6 |  |  | $ | 13.4 |  |  | $ | (4.6 | ) |  | $ | 8.8 |  |
| Technology and trading related | 7.6 |  |  | (3.2 | ) |  | 4.4 |  |  | 8.1 |  |  | (3.3 | ) |  | 4.8 |  |
|  | $ | 21.0 |  |  | $ | (8.0 | ) |  | $ | 13.0 |  |  | $ | 21.5 |  |  | $ | (7.9 | ) |  | $ | 13.6 |  |

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