Derivatives (Narrative) (Details) (USD $) In Millions	3 Months Ended	6 Months Ended
Jun. 26, 2011	Jun. 27, 2010	Jun. 26, 2011	Jun. 27, 2010	Dec. 31, 2009
Derivatives
Net unrealized derivative gains included in AOCI that will be reclassified into earnings within the next twelve months	$ 2.3		$ 2.3
Cash flow hedges derecognized	0	0	0	0
Maturities of the cash flow hedges			12 months or less
Value of the hedge at inception					$ 0

Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 45
-Subparagraph b(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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80748-113994

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