XML 176 R118.htm IDEA: XBRL DOCUMENT
v3.23.1

Financial instruments (Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 CAD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 CAD ($) | Dec. 31, 2020 CAD ($)
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Gain (loss) | $ (72,949,000) |  | $ 12,529,000 |
Cash and cash equivalents | 1,143,674,000 |  | 1,247,447,000 | $ 918,382,000
Short-term investments | 1,138,174,000 |  | $ 84,906,000 |
Pledged cash as security | $ 239,000,000 |  |  |
Collateral account term | 5 years | 5 years |  |
Bottom of range [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Quoted market yields | 3.30% | 3.30% | 1.10% |
Top of range [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Quoted market yields | 4.20% | 4.20% | 1.70% |
Provision of guarantees or collateral by entity related party transactions | $ 179,700,000 | $ 132,600,000 |  |
Interest rate contracts [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Gain (loss) | (6,589,000) |  | $ (673,000) |
Credit risk [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Cash and cash equivalents | 1,143,674,000 |  | 1,247,447,000 |
Short-term investments | $ 1,138,174,000 |  | $ 84,906,000 |
Interest rate risk [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Proportion of outstanding debt that carries fixed rate | 92.00% | 92.00% | 92.00% |
Interest rate risk [member] | Interest rate contracts [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Percentage increase in interest rate | 1.00% | 1.00% |  |
Gain (loss) | $ (766,000) |  |  |
Fair value of Cameco's interest rate swap net liability | 7,284,000 |  | $ 673,000 |
Interest rate risk [member] | Interest rate contracts [Member] | Series H senior unsecured debenture [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional amount | $ 75,000,000 |  |  |
Interest rate risk [member] | Interest rate contracts [Member] | Series H senior unsecured debenture [Member] | Floating interest rate [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Interest rate basis | the three-month Canada Dealer Offered Rate | the three-month Canada Dealer Offered Rate |  |
Margin rate | 1.30% |  |  |
Interest rate risk [member] | Interest rate contracts [Member] | Series H senior unsecured debenture [Member] | Fixed interest rate [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Margin rate | 2.95% |  |  |

X
- Definition Collateral Account Term + References No definition available. + Details
Name: | ccj_CollateralAccountTerm
Namespace Prefix: | ccj_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage change in interest rate. + References No definition available. + Details
Name: | ccj_PercentageIncreaseDecreaseInterestRate
Namespace Prefix: | ccj_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proportion of outstanding debt with fixed rate. + References No definition available. + Details
Name: | ccj_ProportionOfOutstandingDebtWithFixedRate
Namespace Prefix: | ccj_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Quoted market yields. + References No definition available. + Details
Name: | ccj_QuotedMarktYields
Namespace Prefix: | ccj_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_7&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_7&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_BorrowingsInterestRateBasis
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_45&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2021-01-01 -Paragraph B13 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2021-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_i&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_CashAndCashEquivalents
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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
Name: | ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of financial assets that the entity has pledged as collateral for liabilities or contingent liabilities, including amounts that have been reclassified in accordance with paragraph 3.2.23(a) of IFRS 9. [Refer: Contingent liabilities [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 14 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_14_a&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_25&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_FinancialLiabilitiesAtFairValue
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_85&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_NotionalAmount
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of guarantees or collateral provided by the entity in related party transactions. [Refer: Guarantees [member]; Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2021-01-01 -Paragraph 21 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_21_h&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_ProvisionOfGuaranteesOrCollateralByEntityRelatedPartyTransactions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of short-term deposits held by the entity that are not classified as cash equivalents. [Refer: Cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_ShorttermDepositsNotClassifiedAsCashEquivalents
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_InterestRateSwapContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_CreditRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=ccj_SeriesHSeniorunSecuredDebentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FloatingInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FixedInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |