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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
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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- Definition

Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets.

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