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v3.21.1

Commitments and Contingencies (Details) |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2018 defendant | Mar. 31, 2016 party mi | May 31, 2007 claim entity | Mar. 31, 2021 USD ($) mi | Mar. 31, 2020 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Casualty and catastrophic property deductible |  |  |  |  | $ 100,000,000
Casualty and non catastrophic property deductible |  |  |  |  | $ 75,000,000
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 |  |
Number of consolidated class action lawsuits | claim |  |  | 1 |  |
Pending Litigation | Environmental |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of miles pertaining to Passaic River tidal reach required to be studied by EPA | mi |  |  |  | 17 |
Number of miles subject to remediation | mi |  | 8 |  |  |
Number of parties participating in allocation process under study | party |  | 80 |  |  |
Number of parties | defendant | 110 |  |  |  |
Minimum | Pending Litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Possible loss for certain legal proceedings |  |  |  | $ 1,000,000 |
Maximum | Pending Litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Possible loss for certain legal proceedings |  |  |  | 20,000,000 |
Total Casualty |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Self-insured retention amount, per occurrence (up to) |  |  |  | $ 75,000,000 |

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- Definition Number of miles on the Passaic River tidal reach required to be studied as determined by the US Environmental Protection Agency. + References No definition available. + Details
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- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12021-110248 + Details
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