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Casualty, Environmental and Other Reserves - Narrative (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 USD ($) claim site | Dec. 30, 2016 USD ($)
All Contingencies Reserves [Line Items] |  |
Total reserves | $ 366,000,000 | $ 374,000,000
Casualty |  |
All Contingencies Reserves [Line Items] |  |
Total reserves | 226,000,000 | 229,000,000
Self-insured retention amount, per occurrence | $ 50,000,000 |
Number of individual claims expected to exceed self insured retention amount | claim | 0 |
Environmental |  |
All Contingencies Reserves [Line Items] |  |
Total reserves | $ 93,000,000 | 95,000,000
Environmental impaired sites | site | 222 |
Other |  |
All Contingencies Reserves [Line Items] |  |
Total reserves | $ 47,000,000 | $ 50,000,000
Minimum |  |
All Contingencies Reserves [Line Items] |  |
Loss contingency, latency period (in years) | 10 years |
Maximum |  |
All Contingencies Reserves [Line Items] |  |
Loss contingency, latency period (in years) | 40 years |

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- Definition Loss Contingency, Latency Period + 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 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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