Employee Benefit Plans (Details 4)	Dec. 25, 2011	Dec. 26, 2010
Company's pension plans' investment policy and weighted average asset allocations
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Cash and Cash Equivalents [Member]
Company's pension plans' investment policy and weighted average asset allocations
Defined Benefit Plan, Actual Plan Asset Allocations	4.00%	2.00%
Equity Securities [Member]
Company's pension plans' investment policy and weighted average asset allocations
Defined Benefit Plan, Actual Plan Asset Allocations	62.00%	58.00%
Debt Securities [Member]
Company's pension plans' investment policy and weighted average asset allocations
Defined Benefit Plan, Actual Plan Asset Allocations	34.00%	40.00%

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph d(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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