XML 47 R37.htm IDEA: XBRL DOCUMENT v3.23.3

Income Taxes (Details) $ in Millions	3 Months Ended
	Sep. 30, 2022 USD ($)
Income Tax Disclosure [Abstract]
Decrease in deferred income taxes, change in tax rate	$ 136
Decrease in income taxes benefit, change in tax rate	$ 136

X

- Definition

Increase (Decrease) In Deferred Income Taxes, Change In Tax Rate

+ References

No definition available.

+ Details

Name:	nsc_IncreaseDecreaseInDeferredIncomeTaxesChangeInTaxRate
Namespace Prefix:	nsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Increase (Decrease) In Income Taxes Expense (Benefit), Change In Tax Rate

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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