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Acquisition and disposal related gains / (costs) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 28, 2020 | Mar. 29, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 28, 2020 | Jun. 30, 2019
Business Combinations [Abstract] |  |  |  |  |  |
Acquisition and disposal related gains / (costs) | $ 0.0 | $ 0.2 | $ 2.9 | $ 4.6 | $ (0.2) | $ (1.7)
Release of deferred consideration (recognized in acquisition-related costs) |  | $ 0.1 |  |  |  |
Acquisition related gains |  |  | $ 2.9 |  |  |

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- Definition Acquisition and Disposals Related Credits (Costs) + References No definition available. + Details
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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Release of Deferred Consideration + References No definition available. + Details
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- Definition The revenues and gains recognized recorded for each transaction with the acquiree that is recognized separately from the acquisition of assets and assumptions of liabilities in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- References No definition available. + Details
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