| Cover Page | Jul. 30, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jul. 30, 2020 |
| Entity Registrant Name | Schneider National, Inc. |
| Entity Incorporation, State or Country Code | WI |
| Entity File Number | 001-38054 |
| Entity Tax Identification Number | 39-1258315 |
| Entity Address, Address Line One | 3101 South Packerland Drive |
| Entity Address, City or Town | Green Bay |
| Entity Address, State or Province | WI |
| Entity Address, Postal Zip Code | 54313 |
| City Area Code | 920 |
| Local Phone Number | 592-2000 |
| Title of 12(b) Security | Class B common stock, no par value |
| Trading Symbol | SNDR |
| Security Exchange Name | NYSE |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001692063 |
| Amendment Flag | false |
