Pension Plans - Schedule of Amounts Included in Accumulated Other Comprehensive Income Loss (Detail) - Pension Plan - USD ($) $ in Millions	Dec. 28, 2024	Dec. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Net loss, net of tax of $86.9 million and $81.8 million, respectively	$ (264.0)	$ (249.1)
Prior service cost, net of tax of $0.1 million and $0.2 million, respectively	(0.5)	(0.5)
Total amount included in Accumulated OCI	(264.5)	(249.6)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Defined Benefit Plan Disclosure [Line Items]
AOCI, tax	86.9	81.8
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent
Defined Benefit Plan Disclosure [Line Items]
AOCI, tax	$ 0.1	$ 0.2

Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount of tax expense (benefit) allocated to accumulated other comprehensive income (loss) including portion attributable to noncontrolling interest.

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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.

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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).

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