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Employee Benefit Plans (Assumptions) (Details) | 12 Months Ended
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Dec. 30, 2015 | Dec. 31, 2014 | Dec. 25, 2013
Weighted-average assumptions used to determine net perioidic pension cost |  |  |
Discount rate | 4.12% | 4.98% | 4.18%
Expected long-term rate of return on assets | 5.75% | 6.50% | 7.75%
Pension Plan [Member] |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |
Discount rate | 1.34% | 4.12% |
Other Defined Benefit Plans [Member] |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |
Discount rate | 3.62% | 4.12% |
Active and vested deferred participants [Member] |  |  |
Weighted-average assumptions used to determine net perioidic pension cost |  |  |
Percentage of participants that will elect a lump sum upon liquidation | 70.00% |  |
Retired participants [Member] |  |  |
Weighted-average assumptions used to determine net perioidic pension cost |  |  |
Percentage of participants that will elect a lump sum upon liquidation | 50.00% |  |

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- Definition The interest rate used to adjust for the time value of money for the plan. + 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 (k)(1) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The interest rate used to adjust for the time value of money. + 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 (k)(1) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512046 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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