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Goodwill and Other Intangible Assets, Net (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended	6 Months Ended
	Jul. 03, 2011	Jul. 04, 2010	Jul. 03, 2011	Jul. 04, 2010	Jan. 02, 2011	Jul. 03, 2011 Facility Management Contracts [Member]	Jul. 03, 2011 BI Acquisition [Member]	Feb. 10, 2011 BI Acquisition [Member]
Goodwill And Other Intangible Assets Net (Textuals) [Abstract]
Goodwill after Acquisition								$ 282.9
Weighted average useful life			10.8			12.4
Weighted average period						1.3	1.1
Net decrease in goodwill					0.9
Amortization expense	$ 5.0	$ 0.6	$ 9.1	$ 1.1

For intangible assets acquired either individually or as part of a group of assets (in either an asset acquisition or business combination) which have renewal or extension terms, this element represents the weighted-average period prior to the next renewal or extension (both explicit and implicit), by major intangible asset class.

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