Industry Segment Information U.S. revenue as a percent of total revenue worldwide (Details)	12 Months Ended
Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Segment Reporting [Abstract]
Entity-Wide Disclosure on Geographic Areas, Basis for Attributing Revenue to Countries	.724	.652	.672

Basis for attributing revenues from external customers to individual countries.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 38

-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9003-108599

Name:	us-gaap_BasisForAttributingRevenuesFromExternalCustomersToIndividualCountries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration