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Commitments and Contingencies (Details) | 1 Months Ended | 2 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 USD ($) | Mar. 31, 2016 defendant mi | May 31, 2007 entity | May 31, 2018 USD ($) | Jun. 30, 2018 USD ($) claim mi
Loss Contingencies [Line Items] |  |  |  |  |
Casualty and catastrophic property deductible | $ 50,000,000 |  |  |  | $ 50,000,000
Casualty and non catastrophic property deductible | 25,000,000 |  |  |  | $ 25,000,000
Environmental |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of miles pertaining to Passaic River tidal reach required to be studied by EPA | mi |  |  |  |  | 17
Pending Litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Claims with potential material impact (number of claims) | claim |  |  |  |  | 1
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 |  |
Pending Litigation | Minimum |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Possible loss for certain legal proceedings | 2,000,000 |  |  |  | $ 2,000,000
Pending Litigation | Maximum |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Possible loss for certain legal proceedings | 117,000,000 |  |  |  | $ 117,000,000
Settled Litigation | Environmental |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of miles subject to remediation | mi |  | 8 |  |  |
Number of parties | defendant |  | 80 |  |  |
Total Casualty |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Self-insured retention amount, per occurrence | $ 75,000,000 |  |  | $ 50,000,000 |

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