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Group entities (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Significant Investments In Subsidiaries [Abstract]

Ownership interest in subsidiaries

		Principal place	Ownership interest
		of business	2017	2016
Subsidiaries:
	Cameco Fuel Manufacturing Inc.	Canada	100%	100%
	Cameco Marketing Inc.	Canada	100%	-
	Cameco Inc.	US	100%	100%
	Power Resources, Inc.	US	100%	100%
	Crow Butte Resources, Inc.	US	100%	100%
	NUKEM, Inc.	US	100%	-
	NUKEM Investments GmbH	Germany	100%	100%
	Cameco Australia Pty. Ltd.	Australia	100%	100%
	Cameco Europe Ltd.	Switzerland	100%	100%

X

- Definition

The disclosure of interests in subsidiaries. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2016-01-13
-Paragraph 2
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2016-03-30&anchor=para_2_b_i&doctype=Standard
-URIDate 2016-03-31

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- References

No definition available.

+ Details

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