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Summary of Significant Accounting Policies, Derivatives (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 25, 2018 | Dec. 26, 2017 | Dec. 27, 2016
Derivative Instruments and Hedging Activities |  |  |
Amount of hedge ineffectiveness | $ 0.0 | $ 0.0 | $ 0.0

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- Definition The net gain (loss) recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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