XML 40 R74.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

POST-EMPLOYMENT BENEFITS (Details) - CAD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
DisclosureOfPostEmploymentBenefitLiabilityLineItems [Line Items] |  |  |
Current post-employment benefits | $ 150 | $ 150 | $ 250
Noncurrent post-employment benefits | 2,108 | 2,145 | 2,115
Total post-employment benefits | 2,258 | 2,295 | 2,365
Accrued benefit obligation |  |  |
DisclosureOfPostEmploymentBenefitLiabilityLineItems [Line Items] |  |  |
Total post-employment benefits | $ 2,258 | $ 2,295 | $ 2,365

X
- References No definition available. + Details
Name: | DNN_CurrentProvisionForPostEmploymentBenefits
Namespace Prefix: | DNN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- References No definition available. + Details
Name: | DNN_NoncurrentProvisionForPostEmploymentBenefits
Namespace Prefix: | DNN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | DNN_ProvisionsForPostEmploymentBenefits
Namespace Prefix: | DNN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_NetDefinedBenefitLiabilityAssetAxis=ifrs-full_DefinedBenefitPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |