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Document And Entity Information
 6 Months Ended
Apr. 30, 2012
Document And Entity Information [Abstract]  
Document Type 10-Q
Amendment Flag false
Document Period End Date Apr. 30, 2012
Document Fiscal Year Focus 2012
Document Fiscal Period Focus Q2
Entity Registrant Name CURRENCYSHARES CANADIAN DOLLAR TRUST
Entity Central Index Key 0001353612
Current Fiscal Year End Date --10-31
Entity Filer Category Large Accelerated Filer
Entity Common Stock, Shares Outstanding 0