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Financial instruments (Investments in equity securities) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 CAD ($)
Equity investments [Member]
Disclosure of FV of investments in equity instruments designated as measured at FVOCI
Fair value	$ 69,011
Gain (loss)	34,339
Denison [Member]
Disclosure of FV of investments in equity instruments designated as measured at FVOCI
Fair value	34,827
Gain (loss)	15,257
UEX [Member]
Disclosure of FV of investments in equity instruments designated as measured at FVOCI
Fair value	19,605
Gain (loss)	8,758
ISO Energy [Member]
Disclosure of FV of investments in equity instruments designated as measured at FVOCI
Fair value	10,756
Gain (loss)	8,078
GoviEx [Member]
Disclosure of FV of investments in equity instruments designated as measured at FVOCI
Fair value	3,558
Gain (loss)	2,996
Other [Member]
Disclosure of FV of investments in equity instruments designated as measured at FVOCI
Fair value	265
Gain (loss)	$ (750)

X

- Definition

The cumulative gain (loss) on disposal 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 2021-01-01
-Paragraph 11B
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_11B_c&doctype=Standard
-URIDate 2021-03-24

+ Details

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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X

- Definition

The fair value at the date of the derecognition of investments in equity instruments that the entity has designated at fair value through other comprehensive income. [Refer: Investments in equity instruments designated at fair value through other comprehensive income [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph 11B
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_11B_b&doctype=Standard
-URIDate 2021-03-24

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