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NON-CONTROLLING INTERESTS - Effects of changes in Company's ownership interest in less than wholly owned subsidiaries on equity attributable to Canadian Solar Inc (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
NON-CONTROLLING INTERESTS |  |  |
Net income attributable to Canadian Solar Inc. - basic | $ 274,187,000 | $ 239,968,000 | $ 95,248,000
Transfers from the non-controlling interests: |  |  |
Increase in the Company's transfer of equity interest in subsidiary and subsidiary's offering of its equity interests | 3,990,000 |  |
CSI Solar |  |  |
NON-CONTROLLING INTERESTS |  |  |
Net income attributable to Canadian Solar Inc. - basic | 274,187 | 239,968 | 95,248
Transfers from the non-controlling interests: |  |  |
Net transfers from non-controlling interests | 283,024 | 11,729 |
Change from net income attributable to Canadian Solar Inc. and transfers from non-controlling interests | 557,211 | 251,697 | $ 95,248
CSI Solar | Additional Paid-in Capital |  |  |
Transfers from the non-controlling interests: |  |  |
Increase in the Company's transfer of equity interest in subsidiary and subsidiary's offering of its equity interests | 244,629 | 11,185 |
CSI Solar | Accumulated Other Comprehensive Income (Loss) |  |  |
Transfers from the non-controlling interests: |  |  |
Increase in the Company's transfer of equity interest in subsidiary and subsidiary's offering of its equity interests | $ 38,395 | $ 544 |

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