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Other Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Other Intangible Assets | The following table analyzes other intangible assets movements in the year:
(in millions) |  | 2023 |
Gross cost at January 1 |  | $ | 291.1 |
Additions |  | $ | 6.7 |
Exchange effect |  |  | 1.2 |
Gross cost at June 30 |  |  | 299.0 |
Accumulated amortization at January 1 |  |  | (246.1 | )
Amortization expense |  |  | (5.3 | )
Exchange effect |  |  | (0.9 | )
Accumulated amortization at June 30 |  |  | (252.3 | )
Net book amount at June 30 |  | $ | 46.7 |

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