Commitments And Contingencies (Operating Lease Expenses) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	36 Months Ended
Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010	Dec. 31, 2011
Commitments And Contingencies [Abstract]
Operating lease expenses	$ 25.9	$ 20.3	$ 19.9
Operating lease expenses, Total				$ 66.1

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration