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NON-CONTROLLING INTERESTS - Additional Information (Details) - USD ($)
 12 Months Ended
Jun. 09, 2023
Dec. 31, 2021
Jun. 08, 2023
NON-CONTROLLING INTERESTS      
Issuance of ordinary shares, net of issuance costs [1]   $ 148,510,000  
Equity (Deficits) Attribute to Canadian Solar Inc.      
NON-CONTROLLING INTERESTS      
Issuance of ordinary shares, net of issuance costs [1]   $ 148,510,000  
CSI Solar      
NON-CONTROLLING INTERESTS      
Issuance of ordinary shares, net of issuance costs $ 927,897    
Noncontrolling interest ownership percentage 62.24%    
Ownership percentage by non-controlling owners 37.76%   20.41%
CSI Solar | Non-Controlling Interest      
NON-CONTROLLING INTERESTS      
Issuance of ordinary shares, net of issuance costs $ 644,873    
CSI Solar | Additional Paid-in Capital      
NON-CONTROLLING INTERESTS      
Issuance of ordinary shares, net of issuance costs 244,629    
CSI Solar | Accumulated Other Comprehensive Income      
NON-CONTROLLING INTERESTS      
Issuance of ordinary shares, net of issuance costs $ 38,395    
[1] Represented proceeds from “at-the-market” offering of 3,639,918 shares of common shares in 2021, net of commissions and offering expenses of $1,490.