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Pension Plans - Summary of Expected Benefit Payments (Detail) $ in Millions | Dec. 30, 2017 USD ($)
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Retirement Benefits [Abstract] |
2018 | $ 73.6
2019 | 75.2
2020 | 78.9
2021 | 81.5
2022 | 91.4
2023-2027 | $ 462.3

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