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Long-term receivables, investments and other - Equity investments (Details) - CAD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of FV of investments in equity instruments designated as measured at FVOCI |  |  |
Investments in equity securities | [1] | $ 28,916 | $ 21,417
Denison [Member] |  |  |
Disclosure of FV of investments in equity instruments designated as measured at FVOCI |  |  |
Investments in equity securities |  | 15,507 |
UEX [Member] |  |  |
Disclosure of FV of investments in equity instruments designated as measured at FVOCI |  |  |
Investments in equity securities |  | 8,754 |
GoviEx [Member] |  |  |
Disclosure of FV of investments in equity instruments designated as measured at FVOCI |  |  |
Investments in equity securities |  | 2,313 |
Other Equity Investments [Member] |  |  |
Disclosure of FV of investments in equity instruments designated as measured at FVOCI |  |  |
Investments in equity securities |  | $ 2,342 |
[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 . In 2017, these investments were classified as available-for-sale and measured through OCI under IAS 39 (see note 3 ). 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 2018-01-01 -Paragraph 11A -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_11A_c&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 8 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_8_h&doctype=Standard -URIDate 2018-03-16 + Details
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