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Pension Plans - Summary of Benefit Obligations in Excess of Fair Value of Plan Assets (Detail) - Pension Plan - USD ($) $ in Millions | Jan. 02, 2021 | Dec. 28, 2019
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Pension plans with accumulated benefit obligations in excess of plan assets: |  |
Accumulated benefit obligation | $ 266.3 | $ 231.0
Fair value of plan assets | 152.6 | 126.5
Pension plans with projected benefit obligations in excess of plans assets: |  |
Projected benefit obligation | 284.4 | 1,336.9
Fair value of plan assets | $ 152.6 | $ 1,209.5

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