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v3.20.2

Recently issued accounting standards (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 27, 2020 | Jan. 01, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Accounting Standards Update [Extensible List] | us-gaap:AccountingStandardsUpdate201613Member |
Cumulative Effect, Period of Adoption, Adjustment |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Retained earnings |  | $ (0.8)

X
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