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Postretirement Plans - Summary of Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Retiree health care benefits	$ (171.3)	$ (158.9)
U.S. Postretirement Health Care Plans
Defined Benefit Plan Disclosure [Line Items]
Accrued benefits	(2.9)	(3.1)
Retiree health care benefits	(31.8)	(36.0)
Net liability	$ (34.7)	$ (39.1)

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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 current.

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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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