XML 197 R121.htm IDEA: XBRL DOCUMENT
v3.24.1

Pension and other post-retirement benefits (Assumptions and 1% change) (Details) - CAD ($) | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Discount rate [member] |  |
Sensitivity analysis of actuarial assumptions |  |
Increase in actuarial assumption by | 1.00% |
Pension Plans [member] |  |
Assumptions defined benefit obligation and net pension and other benefit expense |  |
Discount rate - obligation | 3.80% | 4.50%
Discount rate - expense | 4.50% | 2.30%
Rate of compensation increase | 2.90% | 3.00%
Pension Plans [member] | Discount rate [member] |  |
Sensitivity analysis of actuarial assumptions |  |
Increase in actuarial assumption by | 1.00% |
Increase in defined benefit obligation | $ (7,739,000) |
Decrease in actuarial assumption by | 1.00% |
Decrease in defined benefit obligation | $ 9,817,000 |
Pension Plans [member] | Increase of one year in the expected lifetime [member] |  |
Sensitivity analysis of actuarial assumptions |  |
Increase in defined benefit obligation | $ 1,583,000 |
Other Benefit Plans [Member] |  |
Assumptions defined benefit obligation and net pension and other benefit expense |  |
Discount rate - obligation | 4.60% | 5.10%
Discount rate - expense | 5.10% | 2.90%
Health care cost trend rate | 5.00% | 5.00%
Dental care cost trend rate | 4.50% | 4.50%
Other Benefit Plans [Member] | Discount rate [member] |  |
Sensitivity analysis of actuarial assumptions |  |
Increase in actuarial assumption by | 0.01% |
Increase in defined benefit obligation | $ (2,143,000) |
Decrease in actuarial assumption by | 0.01% |
Decrease in defined benefit obligation | $ 2,628,000 |

X
- Definition Dental cost trend rate used as significant actuarial assumption to determine the present value of a defined benefit obligation. + References No definition available. + Details
Name: | ccj_ActuarialAssumptionOfDentalCostTrendRates
Namespace Prefix: | ccj_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit expense. + References No definition available. + Details
Name: | ccj_ActuarialAssumptionOfDiscountRatesPriorYearObligations
Namespace Prefix: | ccj_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | ccj_AssumptionsDefinedBenefitObligationNetPensionOtherBenefitExpenseAbstract
Namespace Prefix: | ccj_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_144&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_ActuarialAssumptionOfDiscountRates
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_144&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Medical cost trend rate used as significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_144&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_ActuarialAssumptionOfMedicalCostTrendRates
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase (decrease) in a defined benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 145 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_145_a&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 145 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_145_a&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The reasonably possible percentage of the decrease in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 145 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_145_a&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The reasonably possible percentage of the increase in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 145 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_145_a&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_PercentageOfReasonablyPossibleIncreaseInActuarialAssumption
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_ActuarialAssumptionsAxis=ifrs-full_ActuarialAssumptionOfDiscountRatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=ifrs-full_PensionDefinedBenefitPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ActuarialAssumptionsAxis=ifrs-full_ActuarialAssumptionOfLifeExpectancyAfterRetirementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=ccj_OtherBenefitPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |