Description of the Plan (Details)	12 Months Ended
Dec. 31, 2025 USD ($)
EBP, Description of Plan [Line Items]
Automatic deferral rate, annual increase	1.00%
EBP 001
EBP, Description of Plan [Line Items]
Pretax, minimum annual compensation to total compensation, percentage	1.00%
Pretax, maximum annual compensation to total compensation, percentage	75.00%
Automatic deferral rate, annual increase	1.00%
General loan, borrowing term	5 years
EBP 001 \| Pre-Tax Contribution
EBP, Description of Plan [Line Items]
Matching percentage	100.00%
EBP 001 \| Roth Contribution
EBP, Description of Plan [Line Items]
Matching percentage	50.00%
EBP 001 \| Minimum
EBP, Description of Plan [Line Items]
Automatic deferral rate	6.00%
Involuntary cash-out limit	$ 1,000
EBP 001 \| Minimum \| Pre-Tax Contribution
EBP, Description of Plan [Line Items]
Matching percent maximum of member compensation percentage	1.00%
EBP 001 \| Minimum \| Roth Contribution
EBP, Description of Plan [Line Items]
Matching percent maximum of member compensation percentage	1.00%
EBP 001 \| Maximum
EBP, Description of Plan [Line Items]
Automatic deferral rate	10.00%
Involuntary cash-out limit	$ 7,000
EBP 001 \| Maximum \| Roth Contribution
EBP, Description of Plan [Line Items]
Matching percent maximum of member compensation percentage	6.00%

EBP, Involuntary Cash-Out Limit

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Annual increase in percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) until the contribution reaches maximum threshold.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Pretax, Minimum Annual Compensation to Total Compensation, Percentage

+ References

No definition available.

+ Details

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Namespace Prefix:	nsc_
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- 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 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation.

+ References

+ Details

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Period Type:	duration

- Details

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- Details

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- Details

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Namespace Prefix:
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- Details

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- Details

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