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Postretirement Plans - Schedule of Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Dec. 30, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Retiree health care benefits	$ (82.3)	$ (78.6)
U.S. Postretirement Health Care Plans
Defined Benefit Plan Disclosure [Line Items]
Accrued benefits	(2.6)	(2.7)
Retiree health care benefits	(21.8)	(23.4)
Net asset (liability)	$ (24.4)	$ (26.1)

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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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Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent.

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