XML 68 R57.htm IDEA: XBRL DOCUMENT v3.24.3

Commitments and Contingencies - Insurance (Details) - USD ($)	3 Months Ended		9 Months Ended		20 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Percentage of potential losses covered by insurance on legal liabilities for bodily injury and property damage to third parties	93.00%		93.00%		93.00%
Policy insurance coverage for bodily injury and property damage to third parties, minimum	$ 75,000,000		$ 75,000,000		$ 75,000,000
Policy insurance coverage for bodily injury and property damage to third parties, maximum	$ 734,000,000		$ 734,000,000		$ 734,000,000
Percentage of potential losses covered by insurance on damage to property owned or in control	82.00%		82.00%		82.00%
Policy insurance coverage for potential losses on damage to property owned or in control, minimum	$ 75,000,000		$ 75,000,000		$ 75,000,000
Policy insurance coverage for potential losses on damage to property owned or in control, maximum	275,000,000		275,000,000		275,000,000
Eastern Ohio Incident
Loss Contingencies [Line Items]
Actual insurance coverage for bodily injury and property damage to third parties, minimum	75,000,000		75,000,000		75,000,000
Actual insurance coverage for bodily injury and property damage to third parties, maximum	800,000,000		800,000,000		800,000,000
Actual insurance coverage for bodily injury and property damage to third parties, pollution releases, maximum	$ 1,100,000,000		$ 1,100,000,000		$ 1,100,000,000
Percentage of actual losses covered by insurance on damage to property owned or in control	82.00%		82.00%		82.00%
Actual insurance coverage for potential losses on damage to property owned or in control, minimum	$ 75,000,000		$ 75,000,000		$ 75,000,000
Actual insurance coverage for potential losses on damage to property owned or in control, maximum	275,000,000		275,000,000		275,000,000
Insurance recoveries	288,000,000	$ 25,000,000	552,000,000	$ 25,000,000	653,000,000
Insurance recoveries receivable	$ 223,000,000		$ 223,000,000		$ 223,000,000	$ 0

X

- Definition

Actual Insurance Coverage For Bodily Injury And Property Damage To Third Parties, Maximum

+ References

No definition available.

+ Details

Name:	nsc_ActualInsuranceCoverageForBodilyInjuryAndPropertyDamageToThirdPartiesMaximum
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Actual Insurance Coverage For Bodily Injury And Property Damage To Third Parties, Minimum

+ References

No definition available.

+ Details

Name:	nsc_ActualInsuranceCoverageForBodilyInjuryAndPropertyDamageToThirdPartiesMinimum
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Actual Insurance Coverage For Bodily Injury And Property Damage To Third Parties, Pollution Releases, Maximum

+ References

No definition available.

+ Details

Name:	nsc_ActualInsuranceCoverageForBodilyInjuryAndPropertyDamageToThirdPartiesPollutionReleasesMaximum
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Actual Insurance Coverage For Potential Losses On Damage To Property Owned Or In Control, Maximum

+ References

No definition available.

+ Details

Name:	nsc_ActualInsuranceCoverageForPotentialLossesOnDamageToPropertyOwnedOrInControlMaximum
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Actual Insurance Coverage For Potential Losses On Damage To Property Owned Or In Control, Minimum

+ References

No definition available.

+ Details

Name:	nsc_ActualInsuranceCoverageForPotentialLossesOnDamageToPropertyOwnedOrInControlMinimum
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Percentage Of Actual Losses Covered By Insurance On Damage To Property Owned Or In Control

+ References

No definition available.

+ Details

Name:	nsc_PercentageOfActualLossesCoveredByInsuranceOnDamageToPropertyOwnedOrInControl
Namespace Prefix:	nsc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage Of Potential Losses Covered By Insurance On Damage To Property

+ References

No definition available.

+ Details

Name:	nsc_PercentageOfPotentialLossesCoveredByInsuranceOnDamageToPropertyOwnedOrInControl
Namespace Prefix:	nsc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage Of Potential Losses Covered By Insurance On Legal Liabilities For Bodily Injury And Property Damage To Third Parties

+ References

No definition available.

+ Details

Name:	nsc_PercentageOfPotentialLossesCoveredByInsuranceOnLegalLiabilitiesForBodilyInjuryAndPropertyDamageToThirdParties
Namespace Prefix:	nsc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Policy Insurance Coverage For Bodily Injury And Property Damage To Third Parties, Maximum

+ References

No definition available.

+ Details

Name:	nsc_PolicyInsuranceCoverageForBodilyInjuryAndPropertyDamageToThirdPartiesMaximum
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Policy Insurance Coverage For Bodily Injury And Property Damage To Third Parties, Minimum

+ References

No definition available.

+ Details

Name:	nsc_PolicyInsuranceCoverageForBodilyInjuryAndPropertyDamageToThirdPartiesMinimum
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Policy Insurance Coverage For Potential Losses On Damage To Property Owned Or In Control, Maximum

+ References

No definition available.

+ Details

Name:	nsc_PolicyInsuranceCoverageForPotentialLossesOnDamageToPropertyOwnedOrInControlMaximum
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Policy Insurance Coverage For Potential Losses On Damage To Property Owned Or In Control, Minimum

+ References

No definition available.

+ Details

Name:	nsc_PolicyInsuranceCoverageForPotentialLossesOnDamageToPropertyOwnedOrInControlMinimum
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Unusual or Infrequent Item, or Both, Insurance Proceeds Receivable

+ References

No definition available.

+ Details

Name:	nsc_UnusualOrInfrequentItemOrBothInsuranceProceedsReceivable
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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/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

Reference 3: 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 4: 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 5: 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 6: 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 7: 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 8: 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

Amount of insurance proceeds for an event or transaction that is unusual in nature or infrequent in occurrence, or both.

+ References

Reference 1: 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_UnusualOrInfrequentItemInsuranceProceeds
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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