Fair Value (Summary Of Changes In Fair Market Value Of Company's Level 3 Liabilities) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Jan. 01, 2011
Fair Value [Abstract]
Beginning Balance	$ 11.0
Acquisitions	12.5	11.0
Ending balance	$ 23.5	$ 11.0

This element represents a liability measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant