Retirement Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
Mar. 29, 2013
Defined Benefit Plans
Retirement Plans [Line Items]
Contributions by employer	$ 7.9
Expected total contribution to the defined benefit plans for the fiscal year 2013	10.8
Post-Retirement Benefit Plans
Retirement Plans [Line Items]
Contributions by employer	0.3
Expected total contribution to the defined benefit plans for the fiscal year 2013	$ 0.5

The increase in the fair value of plan assets from contributions made by the employer.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)(3)

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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration