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Pension Plans - Summary of Benefit Obligations in Excess of Fair Value of Plan Assets (Detail) - Pension Plan - USD ($) $ in Millions | Dec. 28, 2019 | Dec. 29, 2018
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Defined Benefit Plan Disclosure [Line Items] |  |
Accumulated benefit obligation | $ 231.0 | $ 1,028.6
Fair value of plan assets | 126.5 | 916.2
Projected benefit obligation | 1,336.9 | 1,183.2
Fair value of plan assets | $ 1,209.5 | $ 1,007.6

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- Definition Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 + Details
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