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Long-term receivables, investments and other - Equity investments (Details) - CAD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of FV of investments in equity instruments designated as measured at FVOCI |  |  |
Investments in equity securities | [1] | $ 43,873 | $ 24,408
Denison [Member] |  |  |
Disclosure of FV of investments in equity instruments designated as measured at FVOCI |  |  |
Investments in equity securities |  | 20,677 | 13,292
UEX [Member] |  |  |
Disclosure of FV of investments in equity instruments designated as measured at FVOCI |  |  |
Investments in equity securities |  | 13,005 | 7,253
GoviEx [Member] |  |  |
Disclosure of FV of investments in equity instruments designated as measured at FVOCI |  |  |
Investments in equity securities |  | 2,875 | 2,000
ISO Energy [Member] |  |  |
Disclosure of FV of investments in equity instruments designated as measured at FVOCI |  |  |
Investments in equity securities |  | 6,923 | 1,481
Other [Member] |  |  |
Disclosure of FV of investments in equity instruments designated as measured at FVOCI |  |  |
Investments in equity securities |  | $ 393 | $ 382
[1] | At January 1, 2018, Cameco designated the investments shown below as equity securities at FVOCI because these equity securities represent investments that the Company intends to hold for the long term for strategic purposes . There were no dividends recognized on any of these investments during the year.

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- Definition The amount of investments in equity instruments that the entity has designated at fair value through other comprehensive income. [Refer: At fair value [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 11A -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_11A_c&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_h&doctype=Standard -URIDate 2020-01-01 + Details
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