Retirement Plans (Schedule Of Defined Benefit Pension Assets Investment) (Details)	12 Months Ended
Dec. 29, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Total	100.00%
Equity investments, Target Return minimum	8.00%
Equity investments, Target Return maximum	11.00%
Fixed income, Target Return minimum	3.50%
Fixed income, Target Return maximum	4.50%
Defined Benefit Plans, Real Estate and Other Real Assets, Target Return Minimum	6.00%
Target Return Total	8.00%
Equity investments, Actual Allocation	100.00%	0.00%
Defined Benefit Plan Real Estate And Other Real Assets	8.00%
Other Credit Derivatives [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity investments, Target Allocation	10.00%
Equity investments, Actual Allocation	8.00%	8.00%
Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity investments, Target Allocation	17.00%
Equity investments, Actual Allocation	23.00%	22.00%
U S Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity investments, Target Allocation	73.00%
Equity investments, Actual Allocation	69.00%	70.00%

Defined benefit pension assets target allocation.

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Defined benefit pension assets target return.

+ References

No definition available.

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- Definition

Defined benefit plan, real estate and other real assets

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Defined Benefit Plans, Real Estate and Other Real Assets, Target Return Minimum

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- Definition

Defined benefit plan target allocation percentage of fixed investment income securities range maximum.

+ References

No definition available.

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Defined benefit plan target allocation percentage of fixed investment income securities range minimum.

+ References

No definition available.

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- Definition

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(i)

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)(i)

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

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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

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Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

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- Definition

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.

+ References

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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