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Commitments and Contingencies - Narratve (Detail) $ in Millions | 12 Months Ended
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Dec. 29, 2018 USD ($) Employees | Dec. 30, 2017 USD ($) | Dec. 31, 2016 USD ($)
Commitments And Contingencies [Line Items] |  |  |
Rent expense, net of sub-lease rental income | $ | $ 33.0 | $ 35.2 | $ 31.2
Collective bargaining agreements expiration | 5 years |  |
Accrued legal charges | $ | $ 30.9 | $ 45.9 |
Benefit recorded related to settlement | $ | $ 4.3 |  |
Workforce Subject to Collective Bargaining Arrangements |  |  |
Commitments And Contingencies [Line Items] |  |  |
Number of employees covered under collective bargaining agreements | 2,650 |  |
Percentage of employees covered under collective bargaining agreements | 21.00% |  |
Workforce Subject to Collective Bargaining Agreements Expiring in 2019 |  |  |
Commitments And Contingencies [Line Items] |  |  |
Number of employees covered under collective bargaining agreements | 875 |  |
Workforce Subject to Collective Bargaining Arrangements Expiring in 2020 |  |  |
Commitments And Contingencies [Line Items] |  |  |
Number of employees covered under collective bargaining agreements | 975 |  |
Workforce Subject to Collective Bargaining Arrangements Expiring in 2021 |  |  |
Commitments And Contingencies [Line Items] |  |  |
Number of employees covered under collective bargaining agreements | 575 |  |
Workforce Subject to Collective Bargaining Arrangements Expiring in 2022 |  |  |
Commitments And Contingencies [Line Items] |  |  |
Number of employees covered under collective bargaining agreements | 175 |  |
Workforce Subject to Collective Bargaining Arrangements Expiring in 2023 |  |  |
Commitments And Contingencies [Line Items] |  |  |
Number of employees covered under collective bargaining agreements | 50 |  |

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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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