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Income Taxes (Narrative) (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 29, 2019 | Mar. 30, 2018 | Dec. 28, 2018
Income Tax Contingency [Line Items] |  |  |
Effective income tax rate | 17.00% | 12.00% |
Statutory federal income tax rate | 21.00% |  |
Other Noncurrent Liabilities [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Unrecognized tax benefits that would impact effective tax rate | $ 62.8 |  | $ 60.5
Unrecognized tax benefit liabilities include interest and penalties | $ 12.0 |  | $ 11.0
Tax Year 2010 and 2011 [Member] | Internal Revenue Service (IRS) [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Proposed Adjustments on Income Tax Assessments |  | $ 51.2 |

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