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Postretirement Plans (Summary of Amounts Included In Accumulated Other Comprehensive Income On Accompanying Consolidated Balance Sheets As Of Year End 2012 And 2011) (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Net gain (loss), tax	$ 147.1	$ 155.6
U.S. Postretirement Health Care Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net gain (loss), tax	$ 0.5	$ 0.3

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- Definition

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

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

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- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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