XML 69 R57.htm IDEA: XBRL DOCUMENT
v3.25.3

Commitments and Contingencies - Eastern Ohio Incident (Details) $ in Millions |  |  |  | 12 Months Ended | 32 Months Ended |
--- | --- | --- | --- | --- | --- | ---
May 23, 2024 USD ($) | Apr. 26, 2024 USD ($) | Aug. 22, 2023 school_district | Dec. 31, 2024 USD ($) | Sep. 30, 2025 USD ($) complaint mi | Jun. 25, 2024 safety_recommendation
Loss Contingencies [Line Items] |  |  |  |  |  |
Settlement payment |  |  |  | $ 315 |  |
Eastern Ohio Incident | Pending Litigation | Minimum |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Consent Decree provisions enforcement period | 5 years |  |  |  |  |
Eastern Ohio Incident | Pending Litigation | Maximum |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Consent Decree provisions enforcement period | 20 years |  |  |  |  |
Eastern Ohio Incident | Pending Litigation | Oversight Costs |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Litigation settlement, amount agreed and awarded to other party | $ 57 |  |  |  |  |
Eastern Ohio Incident | Pending Litigation | Civil Penalty |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Litigation settlement, amount agreed and awarded to other party | $ 15 |  |  |  |  |
Eastern Ohio Incident |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Eastern Ohio incident |  |  |  |  | $ 1,200 |
Unusual or infrequent item, insurance and other proceeds |  |  |  |  | 1,100 |
Deferred tax asset, expenses deductible for tax purposed in future periods or offset with insurance recoveries |  |  |  | 211 | $ 81 |
Litigation settlement, amount agreed and awarded to other party |  | $ 600 |  |  |  |
Litigation settlement, non-environmental legal actions, mile radius of all class action claims | mi |  |  |  |  | 20 |
Litigation settlement, non-environmental legal actions, mile radius of personal injury claims | mi |  |  |  |  | 10 |
Number of school districts as plaintiffs | school_district |  |  | 6 |  |  |
Estimated litigation liability |  |  |  | $ 369 | $ 482 |
Loss contingency, number of pending claims | complaint |  |  |  |  | 6 |
Eastern Ohio Incident | NTSB |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of safety recommendations issued | safety_recommendation |  |  |  |  |  | 30
Eastern Ohio Incident | NTSB | Norfolk Southern |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of safety recommendations issued | safety_recommendation |  |  |  |  |  | 4

X
- Definition Deferred Tax Asset, Expenses Deductible For Tax Purposed In Future Periods Or Offset With Insurance Recoveries + References No definition available. + Details
Name: | nsc_DeferredTaxAssetExpensesDeductibleForTaxPurposedInFuturePeriodsOrOffsetWithInsuranceRecoveries
Namespace Prefix: | nsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Litigation Settlement, Consent Decree Provisions Enforcement Period + References No definition available. + Details
Name: | nsc_LitigationSettlementConsentDecreeProvisionsEnforcementPeriod
Namespace Prefix: | nsc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Litigation Settlement, Non-Environmental Legal Actions, Mile Radius Of All Class Action Claims + References No definition available. + Details
Name: | nsc_LitigationSettlementNonEnvironmentalLegalActionsMileRadiusOfAllClassActionClaims
Namespace Prefix: | nsc_
Data Type: | dtr-types:lengthItemType
Balance Type: | na
Period Type: | instant

X
- Definition Litigation Settlement, Non-Environmental Legal Actions, Mile Radius Of Personal Injury Claims + References No definition available. + Details
Name: | nsc_LitigationSettlementNonEnvironmentalLegalActionsMileRadiusOfPersonalInjuryClaims
Namespace Prefix: | nsc_
Data Type: | dtr-types:lengthItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number Of Safety Recommendations Issued + References No definition available. + Details
Name: | nsc_NumberOfSafetyRecommendationsIssued
Namespace Prefix: | nsc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Unusual Or Infrequent Item, Insurance And Other Proceeds + References No definition available. + Details
Name: | nsc_UnusualOrInfrequentItemInsuranceAndOtherProceeds
Namespace Prefix: | nsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(25)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LitigationReserve
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-9 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-9 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 720 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483359/720-20-50-1 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 27 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482395/460-10-55-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-9 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-4 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-3 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of plaintiffs that have filed claims pertaining to a loss contingency. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-4 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-9 + Details
Name: | us-gaap_LossContingencyNumberOfPlaintiffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-4 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-9 + Details
Name: | us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of cash paid for the settlement of litigation or for other legal issues during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (g) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-25 + Details
Name: | us-gaap_PaymentsForLegalSettlements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of (gain) loss for an event or transaction that is unusual in nature or occurs infrequently, or both. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 270 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477349/740-270-45-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483614/220-20-45-1 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483613/220-20-50-1 + Details
Name: | us-gaap_UnusualOrInfrequentItemNetGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_EnvironmentalRemediationContingencyAxis=nsc_EasternOhioIncidentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=nsc_OversightCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=nsc_CivilPenaltyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_UnusualOrInfrequentItemAxis=nsc_EasternOhioIncidentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=nsc_NationalTransportationSafetyBoardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=nsc_NorfolkSouthernCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |