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Derivative Financial Instruments and Fair Value Measurements (Narrative) (Details) - Not designated as hedging instruments [Member] - Foreign currency put and call option contracts (a zero-cost collar) [Member] $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Apr. 03, 2021 USD ($) | Jan. 02, 2021 USD ($) | Sep. 26, 2020 USD ($)
Derivative [Line Items] |  |  |
Derivative notional amount | $ 7.8 |  | $ 11.8
Collar ceiling rate of Mexican pesos to US dollar | 24.00 |  |
Floor rate of Mexican pesos to US dollar | 21.14 |  |
Unrealized gains included in other current assets | $ 0.3 | $ 0.8 |
Unrealized gain (loss) on derivative contracts | (0.4) |  |
Derivative instruments gain (loss) recognized in income net | $ 0.1 |  |

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