Basis of Presentation (Details)	1 Months Ended	3 Months Ended	9 Months Ended
Feb. 28, 2011 Ratio	Oct. 02, 2011 Ratio	Sep. 26, 2010 Ratio	Oct. 02, 2011 Y segment Ratio statement	Sep. 26, 2010 Ratio
Basis of Presentation.
Stock split conversion ratio	2	2	2	2	2

This item represents the conversion ratio used in the calculation of a stock split.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Stock Split

-URI http://asc.fasb.org/extlink&oid=6525746

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 4

-Subparagraph (SAB TOPIC 4.C)

-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187143-122770

Name:	us-gaap_StockholdersEquityNoteStockSplitConversionRatio
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration