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Income Taxes Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Sep. 29, 2018 | Dec. 30, 2017
Income Tax Disclosure [Abstract] |  |
Deferred tax benefit from remeasurement of deferred taxes |  | $ 45.4
Transition tax |  | $ 0.1
Adjustment to deferred taxes | $ 0.5 |

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