Industry Segment Information U.S. revenue as a percent of total revenue worldwide (Details)	12 Months Ended
Dec. 29, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting [Abstract]
Entity-Wide Disclosure on Geographic Areas, Basis for Attributing Revenue to Countries	.672	.640	.684

Basis for attributing revenues from external customers to individual countries.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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