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INTEREST IN OTHER ENTITIES (Tables) | 12 Months Ended
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Dec. 31, 2019
Significant Subsidiaries Associates Joint Operations And Contractual Arrangements Abstract |
Significant subsidiaries, associates and joint operations |
|  |  | December | December | Fiscal |
|  | Place | 31, 2019 | 31, 2018 | 2019 |
|  | Of | Ownership | Ownership | Participating | Accounting
|  | Business | Interest (1) | Interest (1) | Interest (2) | Method
Subsidiaries |  |  |  |  |  |
Denison Mines Inc. |  | Canada | 100.00% | 100.00% | N/A | Consolidation
Denison AB Holdings Corp. |  | Canada | 100.00% | 100.00% | N/A | Consolidation
Denison Waterbury Corp |  | Canada | 100.00% | 100.00% | N/A | Consolidation
9373721 Canada Inc. |  | Canada | 100.00% | 100.00% | N/A | Consolidation
Denison Mines (Bermuda) I Ltd |  | Bermuda | 100.00% | 100.00% | N/A | Consolidation
Associates |  |  |  |  |  |
GoviEx Uranium Inc. |  | Africa | See Below | 16.21% | N/A | FVTPL/Equity Method
Joint Operations |  |  |  |  |
Waterbury Lake Uranium Corp |  | Canada | 60.00% | 60.00% | 100% | Voting Share (3)
Waterbury Lake Uranium LP |  | Canada | 66.57% | 65.92% | 100% | Voting Share (3)
Key Contractual Arrangements |  |  |  |  |  |
Wheeler River Joint Venture |  | Canada | 90.00% | 90.00% | 90.00% | Denison Share (3)
Midwest Joint Venture |  | Canada | 25.17% | 25.17% | 25.17% | Denison Share (3)
Mann Lake Joint Venture |  | Canada | 30.00% | 30.00% | N/A (4) | Denison Share (3)
Wolly Joint Venture |  | Canada | 21.89% | 21.89% | N/A (4) | Denison Share (3)
McClean Lake Joint Venture |  | Canada | 22.50% | 22.50% | 22.50% | Denison Share (3)

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