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Group entities | 12 Months Ended
--- | ---
Dec. 31, 2020
Disclosure Of Significant Investments In Subsidiaries [Abstract] |
Group entities | 29. Group entities The following are the principal subsidiaries and associates of the Company:
|  | Principal place | Ownership interest
|  | of business | 2020 | 2019
Subsidiaries: |  |  |
| Cameco Fuel Manufacturing Inc. | Canada | 100% | 100%
| Cameco Marketing Inc. | Canada | 100% | 100%
| Cameco Inc. | US | 100% | 100%
| Power Resources, Inc. | US | 100% | 100%
| Crow Butte Resources, Inc. | US | 100% | 100%
| NUKEM, Inc. | US | 100% | 100%
| Cameco Australia Pty. Ltd. | Australia | 100% | 100%
| Cameco Europe Ltd. | Switzerland | 100% | 100%
Associates: |  |  |
| JV Inkai | Kazakhstan | 40% | 40%

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- Definition The disclosure of subsidiaries. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2020-01-01 -Paragraph 17 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_17_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2020-01-01 -Paragraph 16 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_16_b&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B4 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B4_a&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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