| Cover | Mar. 23, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 23, 2020 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 1-8339 |
| Entity Registrant Name | NORFOLK SOUTHERN CORPORATION |
| Entity Central Index Key | 0000702165 |
| Entity Tax Identification Number | 52-1188014 |
| Entity Incorporation, State or Country Code | VA |
| Entity Address, Address Line One | Three Commercial Place |
| Entity Address, City or Town | Norfolk |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 23510-9241 |
| City Area Code | 757 |
| Local Phone Number | 629-2680 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Norfolk Southern Corporation Common Stock (Par Value $1.00) |
| Trading Symbol | NSC |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
