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Income Taxes (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Income Tax Disclosure [Abstract]
Deferred income tax benefit from subsidiary restructuring	$ 27

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- Definition

Deferred Income Tax Expense (Benefit), Subsidiary Restructuring

+ References

No definition available.

+ Details

Name:	nsc_DeferredIncomeTaxExpenseBenefitSubsidiaryRestructuring
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration