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Pension Plans (Summary Of Amounts Included In Accumulated Other Comprehensive Income (Loss)) (Detail) (USD $) In Millions, unless otherwise specified | Dec. 29, 2012 | Dec. 31, 2011
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Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Net gain (loss), net of tax of $147.1 million and $155.6 million, respectively | $ (260.4) | $ (268.0)
Prior service credit (cost), net of tax of $2.5 million and $1.9 million, respectively | 4.0 | (3.0)
Amounts included in accumulated other comprehensive income (loss) | $ (256.4) | $ (271.0)

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- Definition Pension and other postretirement benefit plans, accumulated other comprehensive income (loss), net of tax + References No definition available. + Details
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