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v3.25.1

Determination of fair values (Details) | Dec. 31, 2024 CAD ($)
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Determination of fair value [Abstract] |
Transfers between level 1, level 2, or level 3 during the period | $ 0

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- References No definition available. + Details
Name: | ccj_FairValueMeasurementAbstract
Namespace Prefix: | ccj_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Transfers Between Level 1 Level 2 Or Level 3 Of Fair Value Hierarchy Assets And Liabilities + References No definition available. + Details
Name: | ccj_TransfersBetweenLevel1Level2OrLevel3OfFairValueHierarchyAssetsAndLiabilities
Namespace Prefix: | ccj_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant