XML 171 R112.htm IDEA: XBRL DOCUMENT
v3.19.1

Financial Instruments - Aging of trade receivables (Details) - CAD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | $ 392,865 | $ 392,759
Corporate customers [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 389,381 |
Other customers [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 3,484 |
Current (not past due) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 390,281 |
Current (not past due) | Corporate customers [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 389,012 |
Current (not past due) | Other customers [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 1,269 |
1-30 days past due |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 2,106 |
1-30 days past due | Corporate customers [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 273 |
1-30 days past due | Other customers [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 1,833 |
More than 30 days past due |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 478 |
More than 30 days past due | Corporate customers [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 96 |
More than 30 days past due | Other customers [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | $ 382 |

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- Definition The amount of current trade receivables. [Refer: Trade receivables] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_b&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 68 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_68&doctype=Standard -URIDate 2018-03-16 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- 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
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ccj_TypeOfCustomerAxis=ccj_CorporateCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ccj_TypeOfCustomerAxis=ccj_OtherCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_PastDueStatusAxis=ifrs-full_CurrentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_PastDueStatusAxis=ccj_LaterThanOneDayAndNotLaterThanThirtyDaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_PastDueStatusAxis=ccj_LaterThanOneMonthMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |