v3.19.2

other long-term assets - Summary (Details) - CAD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
other long-term assets |  |
Pension assets | $ 503 | $ 503
Costs incurred to obtain or fulfill a contract with a customer | 105 | 110
Portfolio investments | 70 | 70
Prepaid maintenance | 45 | 55
Real estate joint venture advances | 86 | 69
Real estate joint ventures | 5 | 5
Derivative assets | 2 | 54
Other | 103 | 120
Total | $ 919 | $ 986

X
- Definition The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of non-current financial assets. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_25&doctype=Standard -URIDate 2018-03-16 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of non-current net defined benefit asset. [Refer: Net defined benefit asset] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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Period Type: | instant

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- Definition The amount of non-current assets that the entity does not separately disclose in the same statement or note. [Refer: Non-current assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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Balance Type: | debit
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X
- Definition The amount of non-current assets recognised from the costs to obtain or fulfill contracts with customers. The costs to obtain a contract with a customer are the incremental costs of obtaining the contract that the entity would not have incurred if the contract had not been obtained. The costs to fulfil a contract with a customer are the costs that relate directly to a contract or to an anticipated contract that the entity can specifically identify. + References No definition available. + Details
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Namespace Prefix: | tu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of non-current assets that the entity does not separately disclose in the note. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition n/a + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition The amount of prepaid non-current maintenance expenses for the day-to-day servicing of assets, which may include the cost of labour, consumables or small parts. + References No definition available. + Details
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Balance Type: | debit
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X
- Definition Represents the amount of real estate joint venture advances included in other non-current assets as of the period end date. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | instant

X
- Definition Represents the amount of real estate joint ventures included in other non-current assets as of the period end date. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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