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v3.20.1

Segmental Information - Reconciliation of consolidated segment income (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 29, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jul. 01, 2018 | Apr. 01, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting [Abstract] |  |  |  |  |  |  |  |  |  |  |
Adjusted EBITDA |  |  |  |  |  |  |  |  | $ 68.1 | $ 79.6 | $ 59.3
Other share-based compensation charges |  |  |  |  |  |  |  |  | (4.5) | (4.8) | (2.2)
Loss on disposal of property, plant and equipment |  |  |  |  |  |  |  |  | (0.2) | (0.3) | 0.0
Depreciation and amortization |  |  |  |  |  |  |  |  | (15.3) | (19.0) | (18.3)
Unwind of discount on deferred consideration |  |  |  |  |  |  |  |  | (0.2) | (0.2) | (0.2)
Restructuring charges |  |  |  |  |  |  |  |  | (25.9) | (13.4) | (8.4)
Impairment charges | $ (5.2) |  |  |  |  |  |  |  | (5.0) | (7.2) | (3.7)
Acquisition (costs) / credit |  |  |  |  |  |  |  |  | (1.4) | (4.3) | 1.3
Other charges |  |  |  |  |  |  |  |  | (2.5) | 0.0 | (5.8)
Defined benefits pension mark-to-market gain |  |  |  |  |  |  |  |  | 1.3 | 4.7 | 4.2
Interest expense, net |  |  |  |  |  |  |  |  | (4.6) | (4.6) | (6.3)
Provision for income taxes |  |  |  |  |  |  |  |  | (6.7) | (5.5) | (3.3)
Net income | $ (2.4) | $ 5.8 | $ 3.5 | $ (3.8) | $ (8.5) | $ 12.2 | $ 11.4 | $ 9.9 | $ 3.1 | $ 25.0 | $ 16.6

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228 + Details
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