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The intrinsic value of liabilities arising from share-based transactions for which the counterparty's right to cash or other assets had vested by the end of the period (for example, vested share appreciation rights). The intrinsic value is the difference between the fair value of the shares to which the counterparty has the (conditional or unconditional) right to subscribe, or which it has the right to receive, and the price (if any) that the counterparty is (or will be) required to pay for those shares. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services, for which the counterparty's right to cash or other assets had vested by the end of the period (for example, vested share appreciation rights).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2021-01-01
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The amount of compensation to key management personnel in the form of post-employment benefits. [Refer: Key management personnel of entity or parent [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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The amount of compensation to key management personnel in the form of share-based payments. [Refer: Key management personnel of entity or parent [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The amount of compensation to key management personnel in the form of short-term employee benefits. [Refer: Key management personnel of entity or parent [member]]

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The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

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The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement.

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-Name IFRS
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-IssueDate 2021-01-01
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-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
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-Paragraph 45
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The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement.

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The number of share options exercised in a share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2021-01-01
-Paragraph 45
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The number of share options granted in a share-based payment arrangement.

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-Name IFRS
-Number 2
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-Paragraph 45
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The weighted average exercise price of share options exercised in a share-based payment arrangement. [Refer: Weighted average [member]]

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The weighted average fair value at the measurement date of granted equity instruments other than share options. [Refer: Weighted average [member]]

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The weighted average fair value of share options granted during the period at the measurement date. [Refer: Weighted average [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
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The amount of charges for management and administrative services provided to defined benefit plans; the charges for these services were on a cost recovery basis.

No definition available.

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The amount paid out for deferred share units awarded to Key managerial personnel. Deferred share units are paid out when a director ceases to be a director, for any reason, at a time elected by the director.

No definition available.

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The amount of liability accounted for restricted share unit and share options awards .

No definition available.

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No definition available.

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The amount of annual cash bonus as a percentage of base salary upon termination without cause.

No definition available.

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Number of months' of base salary, benefits and accrual of pension service in lieu of notice, to be considered for severance payments if an executive's employment is terminated without cause.

No definition available.

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The notional value of other equity instruments (i.e. other than share options) granted in a share-based payment arrangement.

No definition available.

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The notional value of share options granted in a share-based payment arrangement.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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No definition available.

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No definition available.

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No definition available.

Name:	tu_TransactionsWithRealEstateJointVenturesAbstract
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The weighted average fair value of equity instruments granted during the period at the measurement date.

No definition available.

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