| Cover Page | 12 Months Ended |
| Dec. 31, 2024 shares |
| Document Information [Line Items] | |
| Document Type | 40-F/A |
| Amendment Flag | false |
| Document Period End Date | Dec. 31, 2024 |
| Document Fiscal Year Focus | 2024 |
| Document Fiscal Period Focus | FY |
| Entity Registrant Name | TFI INTERNATIONAL INC. |
| Entity Central Index Key | 0001588823 |
| Entity Current Reporting Status | Yes |
| Entity Interactive Data Current | Yes |
| Current Fiscal Year End Date | --12-31 |
| ICFR Auditor Attestation Flag | true |
| Document Financial Statement Error Correction [Flag] | true |
| Document Financial Statement Restatement Recovery Analysis [Flag] | false |
| Entity Common Stock, Shares Outstanding | 84,408,437 |
| Entity Emerging Growth Company | false |
| Title of 12(b) Security | Common Shares |
| Trading Symbol | TFII |
| Security Exchange Name | NYSE |
| Entity File Number | 001-39224 |
| Entity Incorporation, State or Country Code | Z4 |
| Entity Primary SIC Number | 4210 |
| Entity Address, Address Line One | 8801 Trans-Canada Highway |
| Entity Address, Address Line Two | Suite 500 |
| Entity Address, City or Town | Saint-Laurent |
| Entity Address, State or Province | QC |
| Entity Address, Postal Zip Code | H4S 1Z6 |
| Entity Address, Country | CA |
| City Area Code | 514 |
| Local Phone Number | 331-4000 |
| Document Annual Report | true |
| Annual Information Form | true |
| Audited Annual Financial Statements | true |
| Document Registration Statement | false |
| Auditor Name | KPMG LLP |
| Auditor Firm ID | 85 |
| Auditor Location | Montreal, QC, Canada |
| Business Contact | |
| Document Information [Line Items] | |
| Entity Address, Address Line One | County of New Castle |
| Entity Address, Address Line Two | 251 Little Falls Drive |
| Entity Address, City or Town | Wilmington |
| Entity Address, State or Province | DE |
| Entity Address, Postal Zip Code | 19808 |
| City Area Code | 866 |
| Local Phone Number | 927-9800 |
| Contact Personnel Name | Corporation Service Company |
