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Segmental Information - Reconciliation of Consolidated Segment Income (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2024 | Apr. 02, 2023
Segment Reporting [Abstract] |  |
Adjusted EBITDA | $ 8.8 | $ 11.3
Other share-based compensation charges | (0.6) | (0.6)
Depreciation and amortization | (2.4) | (3.3)
Restructuring charges | (0.7) | (0.3)
Acquisition and disposal related costs | (0.2) | 0.0
Defined benefits pension credit / (charge) | 0.3 | (8.9)
Interest expense, net | (1.4) | (1.3)
Net income / (loss) before income taxes from continuing operations | $ 3.8 | $ (3.1)

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