Pension Plans and Other Retirement Benefits - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
Oct. 27, 2012	Oct. 27, 2012
Pension and Other Postretirement Benefits Disclosure [Line Items]
Minimum percentage of pension liability		80.00%
Anticipated employer's contribution to provide current benefits coming due under the unfunded plan in fiscal 2013	$ 3,400,000	$ 3,400,000
Correction of Prior Years Pension Accruals
Pension and Other Postretirement Benefits Disclosure [Line Items]
Total expense	$ 22,300,000	$ 22,300,000

The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph g

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant