Other Expense, Net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 30, 2011	Sep. 24, 2010	Sep. 25, 2009	Sep. 30, 2011 Change in receivables due from Covidien and Tyco Electronics under Tax Sharing Agreement	Sep. 24, 2010 Change in receivables due from Covidien and Tyco Electronics under Tax Sharing Agreement	Sep. 25, 2009 Change in receivables due from Covidien and Tyco Electronics under Tax Sharing Agreement	Sep. 30, 2011 Income from equity method investments Atkore	Sep. 24, 2010 Loss on extinguishment of debt	Sep. 25, 2009 Gain on derivative contracts	May 28, 2010 6.375% public notes due 2011	May 28, 2010 7.0% public notes due 2028	May 28, 2010 6.875% public notes due 2029
Components of Other Expense, Net
Other expense, net	$ 16	$ 75	$ 7	$ 7	$ (8)	$ 14	$ 9	$ 87	$ (5)
Debt stated interest rate (as a percent)										6.375%	7.00%	6.875%

The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 9

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.9)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration