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Commitments and Contingencies (Details) | 1 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2014 mi | May. 31, 2007 entity | Jun. 26, 2015 USD ($) party mi
Commitments and Contingencies Disclosure [Abstract] |  |  |
Non-catastrophic property deductible per occurrence |  |  | $ 25,000,000
Casualty and catastrophic property deductible per occurrence |  |  | $ 50,000,000
Environmental |  |  |
Loss Contingencies [Line Items] |  |  |
Number of miles subject to remediation | mi | 8 |  | 17
Number of parties involved in remediation | party |  |  | 60
Pending Litigation |  |  |
Loss Contingencies [Line Items] |  |  |
Range of possible loss for certain legal proceedings, minimum |  |  | $ 3,000,000
Range of possible loss for certain legal proceedings, maximum |  |  | $ 49,000,000
Pending Litigation | Fuel Surcharge Antitrust Litigation |  |  |
Loss Contingencies [Line Items] |  |  |
Class action lawsuits filed against U.S.-based Class I railroads, excluding CSXT (number of entities) | entity |  | 3 |

X
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- Definition The estimated maximum amount of possible loss from the contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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