XML 162 R103.htm IDEA: XBRL DOCUMENT
v3.19.1

Share-based compensation plans - Inputs used in the measurement (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 CAD ($) shares yr | Dec. 31, 2017 CAD ($) shares | Dec. 31, 2016 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of options granted | shares | 1,473,430 | 1,373,040 |
Average strike price | $ 11.32 | $ 14.7 |
Number of options, reporting date | shares | 8,820,805 | 8,324,666 | 8,020,311
Average strike price, reporting date | $ 22.83 | $ 24.95 |
Stock Option Plan [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of options granted | shares | 1,473,430 |  |
Average strike price | $ 11.32 |  |
Expected dividend | $ 0.08 |  |
Expected volatility | 35.00% |  |
Risk-free interest rate | 2.00% |  |
Expected life of option | yr | 4.8 |  |
Expected forfeitures | 7.00% |  |
Weighted average grant date fair values | $ 3.48 |  |
Performance Share Unit Plan [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of options granted | shares | 602,530 |  |
Average strike price | $ 0 |  |
Expected dividend | $ 0 |  |
Expected volatility | 37.00% |  |
Risk-free interest rate | 1.90% |  |
Expected life of option | yr | 3 |  |
Expected forfeitures | 9.00% |  |
Weighted average grant date fair values | $ 11.43 |  |
Restricted Share Unit Plan [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of options granted | shares | 377,021 |  |
Average strike price | $ 11.46 |  |
Expected dividend | $ 0 |  |
Expected volatility | 0.00% |  |
Risk-free interest rate | 0.00% |  |
Expected life of option | yr | 0 |  |
Expected forfeitures | 13.00% |  |
Weighted average grant date fair values | $ 11.46 |  |
Phantom Stock Option Plan [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of options granted | shares | 101,895 |  |
Average strike price | $ 11.32 |  |
Expected dividend | $ 0.08 |  |
Expected volatility | 35.00% |  |
Risk-free interest rate | 1.90% |  |
Expected life of option | yr | 4.5 |  |
Expected forfeitures | 7.00% |  |
Weighted average grant date fair values | $ 3.68 |  |
Number of options, reporting date | shares | 353,580 |  |
Average strike price, reporting date | $ 17.74 | $ 22.13 |
Expected dividend, reporting date | $ 0.08 |  |
Expected volatility, reporting date | 37.00% |  |
Risk free interest rate, reporting date | 1.90% |  |
Expected life of option, reporting date | yr | 3.7 |  |
Expected forfeitures, reporting date | 8.00% |  |
Weighted average share price, reporting date | $ 4.21 |  |

X
- Definition The expected forfeitures of the share price used to calculate the fair value of the share options granted. + References No definition available. + Details
Name: | ccj_DescriptionOfExpectedForfeituresShareOptionsGranted
Namespace Prefix: | ccj_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of expeted forfeitures share options oustanding. + References No definition available. + Details
Name: | ccj_DescriptionOfExpectedForfeituresShareOptionsOustading
Namespace Prefix: | ccj_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The option life of share options oustanding. + References No definition available. + Details
Name: | ccj_DescriptionOfOptionLifeShareOptions
Namespace Prefix: | ccj_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of an expected dividend used to calculate the fair value of share options. + References No definition available. + Details
Name: | ccj_ExpectedDividendShareOptionsReportingDate
Namespace Prefix: | ccj_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The expected volatility of the share price used to calculate the fair value of the share options on the reporting date. + References No definition available. + Details
Name: | ccj_ExpectedVolatilityShareOptions
Namespace Prefix: | ccj_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options outstanding expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). + References No definition available. + Details
Name: | ccj_RiskFreeInterestRateShareOptionsOustanding
Namespace Prefix: | ccj_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The option life of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DescriptionOfOptionLifeShareOptionsGranted
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of an expected dividend used to calculate the fair value of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_ExpectedDividendShareOptionsGranted
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of share options outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45_d&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45_b_i&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -Subparagraph b -Clause vi -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45_b_vi&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_NumberOfOutstandingShareOptions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of share options granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45_b_ii&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of share options exercisable in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -Subparagraph b -Clause vii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45_b_vii&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average exercise price of share options granted in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45_b_ii&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average share price. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45_c&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_WeightedAverageSharePrice
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_WeightedAverageSharePriceShareOptionsGranted
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ccj_StockOptionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ccj_PerformanceShareUnitPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ccj_RestrictedShareUnitPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ccj_PhantomStockOptionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |