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Casualty, Environmental and Other Reserves (Casualty) (Details) - Casualty [Member] | 12 Months Ended |
--- | --- | ---
Dec. 25, 2015 USD ($) claim | Dec. 26, 2014 USD ($) | Dec. 27, 2013 USD ($) | Dec. 28, 2012 USD ($)
Loss Contingencies [Line Items] |  |  |  |
Reserves | $ 269,000,000 | $ 265,000,000 | $ 280,000,000 | $ 325,000,000
Self-insured retention amount per injury | $ 50,000,000 |  |  |
Individual claims expected to exceed self-insured retention amount | claim | 0 |  |  |
Change in estimate recorded to adjust reserves | $ 0 | $ 0 | $ 0 |

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- Definition Changes in casualty reserves based on management's review of independent third-party estimates. + References No definition available. + Details
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- Definition Total number of claims expected to exceed self-insured retention amount, as of the balance sheet date. + References No definition available. + Details
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- Definition Self insured retention amount for casualty and catastrophic property programs. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Details
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