| Cover | 12 Months Ended |
| Dec. 31, 2021shares | |
| Document Information Line Items | |
| Entity Registrant Name | FEC RESOURCES INC. |
| Entity Central Index Key | 0000849997 |
| Document Type | 20-F/A |
| Amendment Flag | true |
| Entity Voluntary Filers | No |
| Current Fiscal Year End Date | --12-31 |
| Entity Well Known Seasoned Issuer | No |
| Entity Shell Company | false |
| Entity Emerging Growth Company | false |
| Entity Current Reporting Status | Yes |
| Document Period End Date | Dec. 31, 2021 |
| Entity Filer Category | Non-accelerated Filer |
| Document Fiscal Period Focus | FY |
| Document Fiscal Year Focus | 2021 |
| Entity Common Stock Shares Outstanding | 861,082,371 |
| Document Registration Statement | false |
| Document Annual Report | true |
| Document Transition Report | false |
| Entity Interactive Data Current | Yes |
| Document Shell Company Report | false |
| Entity Incorporation State Country Code | Z4 |
| Entity Address Address Line 1 | Suite 2300 |
| Entity Address Address Line 2 | Bentall 5 |
| Entity Address Address Line 3 | 550 Burrard Street |
| Entity Address City Or Town | Vancouver |
| Entity Address State Or Province | BC |
| Auditor Name | DALE MATHESON CARRHILTON LABONTE LLP |
| Auditor Location | Vancouver, Canada |
| Entity File Number | 0-17729 |
| Entity Address Postal Zip Code | V6C 2B5 |
| Security 12g Title | Common Stock, without par value |
| Document Accounting Standard | International Financial Reporting Standards |
| Auditor Firm Id | 1173 |
| Amendment Description | FEC Resources Inc. (the “Company,” “we,” “us” or “our”) is filing this Amendment No. 1 to its Annual Report on Form 20F/A for the year ended December 31, 2021 (the “Amended Annual Report”) for the sole purpose of correcting the cover page of the annual report as filed with the Securities and Exchange Commission (the “SEC”) on April 1, 2022 (the “Original Annual Report”). This Amended Annual Report corrects the number of outstanding shares of common stock as of the close of the period covered by the Original Annual Report from 409,143,765 to 861,082,371 shares of common stock. This Amended Annual Report speaks as of the filing date of the Form 20-F (the "Filing Date"), does not reflect events that may have occurred subsequent to the Filing Date, and does not modify or update in any way disclosures made in the Form 20-F filed as of April 1, 2022. |
| Business Contact [Member] | |
| Document Information Line Items | |
| Entity Address Address Line 1 | Suite 2300 |
| Entity Address Address Line 2 | Bentall 5 |
| Entity Address Address Line 3 | 550 Burrard Street |
| Entity Address City Or Town | Vancouver |
| Entity Address State Or Province | BC |
| Contact Personnel Name | Paul Wallace |
| Local Phone Number | 61447296715 |
| Entity Address Postal Zip Code | V6C 2B5 |
