XML 202 R108.htm IDEA: XBRL DOCUMENT
v3.10.0.1

share-based compensation - Employee share purchase plan (Details) - Employee share purchase plan - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
share-based compensation |  |
Dividend reinvestment in Common Shares | $ 34 | $ 31
Purchase plan discount | 0.00% | 0.00%

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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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Balance Type: | na
Period Type: | duration

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- Definition The amount of dividends reinvested in common shares. + References No definition available. + Details
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Namespace Prefix: | tu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Discount rate from fair value on purchase date that participants pay for shares. + References No definition available. + Details
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Namespace Prefix: | tu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
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Balance Type: |
Period Type: |