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Postretirement Plans - Schedule of Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Dec. 28, 2024	Dec. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Retiree health care benefits	$ (78.4)	$ (82.3)
U.S. Postretirement Health Care Plans
Defined Benefit Plan Disclosure [Line Items]
Accrued benefits	(2.5)	(2.6)
Retiree health care benefits	(19.4)	(21.8)
Net asset	$ (21.9)	$ (24.4)

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- Definition

Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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