The calculated weighted-average amortization period of a major class of finite-lived intangible assets acquired during the current period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 44
-Subparagraph a(3)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16265-109275

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

BUSINESS ACQUISITIONS, INVESTMENTS AND REDEEMABLE NONCONTROLLING INTERESTS (Details 3) (USD $) In Thousands, unless otherwise specified							9 Months Ended
	Aug. 27, 2011	Dec. 29, 2010 TransWeb [Member] Trade names and trademarks - indefinite lived [Member]	Dec. 29, 2010 TransWeb [Member]	Dec. 29, 2010 TransWeb [Member] Customer relationships [Member]	Dec. 29, 2010 TransWeb [Member] Developed technology [Member]	Dec. 29, 2010 TransWeb [Member] Non-compete agreements [Member]	Aug. 27, 2011 Customer relationships [Member] years	Aug. 27, 2011 Developed technology [Member] years	Aug. 27, 2011 Non-compete agreements [Member] years
Acquired Finite-Lived Intangible Assets [Line Items]
Trade names and trademarks - indefinite lived	$ 42,525	$ 900
Acquired Finite-lived Intangible Asset, Amount			$ 12,100	$ 8,500	$ 3,500	$ 100
Acquired Finite-lived Intangible Asset, Estimated Useful Life in Years							12	12	2