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Pension Plans - Summary of Amounts Included in Accumulated Other Comprehensive Income Loss (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Compensation And Retirement Disclosure [Abstract]
Net loss, net of tax of $96.5 million and $147.1 million, respectively	$ (175.4)	$ (260.4)
Prior service credit, net of tax of $2.3 million and $2.5 million, respectively	4.0	4.0
Amounts included in accumulated other comprehensive income (loss)	$ (171.4)	$ (256.4)

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- Definition

Pension and other postretirement benefit plans, accumulated other comprehensive income (loss), net gains (losses), net of tax

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Pension and other postretirement benefit plans, accumulated other comprehensive income (loss), net of tax

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- Definition

Pension and other postretirement benefit plans, accumulated other comprehensive income (loss), net prior service cost (credit), net of tax

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