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Pension Plans - Summary of Amounts Included in Accumulated Other Comprehensive Income Loss (Detail) - Pension Plan - USD ($) $ in Millions | Jan. 02, 2021 | Dec. 28, 2019
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Defined Benefit Plan Disclosure [Line Items] |  |
Net loss, net of tax of $95.4 million and $104.8 million, respectively | $ (302.2) | $ (333.8)
Prior service cost, net of tax of ($0.2) million and ($0.1) million, respectively | (0.7) | (0.6)
Amounts included in accumulated other comprehensive income (loss) | (302.9) | (334.4)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent |  |
Defined Benefit Plan Disclosure [Line Items] |  |
AOCI, tax | 95.4 | 104.8
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent |  |
Defined Benefit Plan Disclosure [Line Items] |  |
AOCI, tax | $ (0.2) | $ (0.1)

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- Definition Amount of tax expense (benefit) allocated to accumulated other comprehensive income (loss) including portion attributable to noncontrolling interest. + References No definition available. + Details
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- Definition Amount, after tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 + Details
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