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Income Taxes - Summary (Details) $ in Millions | 12 Months Ended
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Dec. 29, 2018 USD ($) | Dec. 30, 2017 USD ($) | Dec. 31, 2016
Income Taxes |  |  |
Federal statutory rate (as a percent) | 21.00% | 35.00% | 35.00%
Decrease in effective tax rate due to changes in provisional amount | (6.2) |  |
Benefit to the provisional amounts recorded at December 30, 2017 | $ (4.5) |  |
Transition tax cost |  | $ 54.4 |
Total provisional transaction tax liability |  | 42.6 |
Decrease in provisional amount related to transition tax recorded at December 30, 2017 | $ (6.1) |  |
Period for payment of transition tax | 8 years |  |
Unpaid balance of its transition tax obligation payable between April 2022 and April 2025 | $ 21.6 |  |
Net provisional benefit on remeasurement of certain deferred tax assets and liabilities |  | (28.1) |
Increase in deferred tax expense due to revaluation of net deferred tax asset |  | 21.8 |
Reduction in provisional tax benefit | $ 1.0 |  |
Altera decision |  |  |
Income Taxes |  |  |
Reversal of deferred tax liability |  | 39.4 |
Reduction in deferred tax benefit due to reduction of corresponding deferred tax liability |  | $ 10.5 |

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