XML 87 R117.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

INTEREST IN OTHER ENTITIES (Details) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Waterbury Lake Uranium Corp |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, joint operations |  | Canada |
Ownership interest, joint operations | [1] | 60.00% | 60.00%
Participating interest | [2] | 100.00% |
Accounting method | [3] | Voting Share |
Waterbury Lake Uranium LP |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, joint operations |  | Canada |
Ownership interest, joint operations | [1] | 66.57% | 65.92%
Participating interest | [2] | 100.00% |
Accounting method | [3] | Voting Share |
Wheeler River Joint Venture |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, key contractual arrangements |  | Canada |
Ownership interest, key contractual arrangements | [1] | 90.00% | 90.00%
Participating interest | [2] | 90.00% |
Accounting method | [3] | Denison Share |
MidwestJointVenture |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, key contractual arrangements |  | Canada |
Ownership interest, key contractual arrangements | [1] | 25.17% | 25.17%
Participating interest | [2] | 25.17% |
Accounting method | [3] | Denison Share |
Mann Lake Joint Venture |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, key contractual arrangements |  | Canada |
Ownership interest, key contractual arrangements | [1] | 30.00% | 30.00%
Participating interest | [4] | 0.00% |
Accounting method | [3] | Denison Share |
Wolly Joint Venture |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, key contractual arrangements |  | Canada |
Ownership interest, key contractual arrangements | [1] | 21.89% | 21.89%
Participating interest | [4] | 0.00% |
Accounting method | [3] | Denison Share |
McClean Lake Joint Venture |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, key contractual arrangements |  | Canada |
Ownership interest, key contractual arrangements | [1] | 22.50% | 22.50%
Participating interest |  | 22.50% |
Accounting method | [3] | Denison Share |
GoviEx Uranium Inc. |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, associates |  | Africa |
Ownership interest, associates | [1] |  | 16.21%
Accounting method |  | FVTPL/Equity Method |
Denison Mines Inc. |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, subsidiaries |  | Canada |
Ownership interest, subsidiaries | [1] | 100.00% | 100.00%
Accounting method |  | Consolidation |
Denison AB Holdings Corp. |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, subsidiaries |  | Canada |
Ownership interest, subsidiaries | [1] | 100.00% | 100.00%
Accounting method |  | Consolidation |
Denison Waterbury Corp |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, subsidiaries |  | Canada |
Ownership interest, subsidiaries | [1] | 100.00% | 100.00%
Accounting method |  | Consolidation |
9373721 Canada Inc. |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, subsidiaries |  | Canada |
Ownership interest, subsidiaries | [1] | 100.00% | 100.00%
Accounting method |  | Consolidation |
Denison Mines (Bermuda) I Ltd |  |  |
DisclosureOfSignificantInvestmentsInSubsidiariesAssociatesJointOperationAndContractualArrangementsLineItems [Line Items] |  |  |
Place of business, subsidiaries |  | Bermuda |
Ownership interest, subsidiaries | [1] | 100.00% | 100.00%
Accounting method |  | Consolidation |
[1] | (1) Ownership Interest represents Denisons percentage equity / voting interest in the entity or contractual arrangement;
[2] | (2) Participating interest represents Denisons percentage funding contribution to the particular joint operation or contractual arrangement. This percentage can differ from ownership interest in instances where other parties to the arrangement have carried interests, they are earning-in to the arrangement, or they are diluting their interest in the arrangement (provided the arrangement has dilution provisions therein)
[3] | (3) Denison Share is where Denison accounts for its share of assets, liabilities, revenues and expenses in accordance with the specific terms within the contractual arrangement. this can be by using either its ownership interest (i.e. Voting Share) or its participating interest (i.e. Funding Share), depending on the arrangement terms. The Voting Share and Funding Share approaches produce the same accounting result when the Companys ownership interest and participating interests are equal
[4] | (4) The participating interest for 2019 for these arrangements is shown as Not Applicable as there were no approved spending programs carried out during fiscal 2019.

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

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

X
- References No definition available. + Details
Name: | DNN_ParticipatingInterest
Namespace Prefix: | DNN_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- References No definition available. + Details
Name: | DNN_ProportionOfOwnershipInterestKeyContractualArrangements
Namespace Prefix: | DNN_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The principal place of business of an associate. [Refer: Principal place of business; Associates [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 16 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_16_b_ii&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 17 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_17_b_ii&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 21 -Subparagraph a -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_21_a_iii&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_PrincipalPlaceOfBusinessOfAssociate
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The principal place of business of a joint operation. [Refer: Joint operations [member]; Principal place of business] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 21 -Subparagraph a -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_21_a_iii&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_PrincipalPlaceOfBusinessOfJointOperation
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The principal place of business of a subsidiary. [Refer: Principal place of business; Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 16 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_16_b_ii&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 17 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_17_b_ii&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 12 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_12_b&doctype=Standard -URIDate 2019-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 19B -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_19B_b&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_PrincipalPlaceOfBusinessOfSubsidiary
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of ownership interest in an associate attributable to the entity. [Refer: Associates [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_21_a_iv&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInAssociate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of ownership interest in a joint operation attributable to the entity. [Refer: Joint operations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_21_a_iv&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInJointOperation
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 19B -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_19B_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInSubsidiary
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_JointOperationsAxis=DNN_WaterburyLakeUraniumCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=DNN_WaterburyLakeUraniumLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=DNN_WheelerRiverJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=DNN_MidwestJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=DNN_MannLakeJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=DNN_WollyJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=DNN_McCleanLakeJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=DNN_GoviexUraniumIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=DNN_DenisonMinesIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=DNN_DenisonABHoldingsCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=DNN_DenisonWaterburyCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=DNN_CanadaInc9373721Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=DNN_DenisonMinesBermudaILtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |