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Document and Entity Information
 12 Months Ended
Dec. 31, 2020
shares
Cover [Abstract]  
Entity Registrant Name North American Nickel Inc.
Entity Central Index Key 0000795800
Document Type 20-F
Amendment Flag false
Document Period End Date Dec. 31, 2020
Current Fiscal Year End Date --12-31
Entity Well Known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current No
Entity Filer Category Non-accelerated Filer
Entity Emerging Growth Company false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 109,899,307
Document Fiscal Period Focus FY
Document Fiscal Year Focus 2020
Document Annual Report true
Document Transition Report false
Document Shell Company Report false