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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 2018-01-01
-Paragraph 17
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_17&doctype=Standard
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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
-Number 24
-IssueDate 2018-01-01
-Paragraph 17
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_17_b&doctype=Standard
-URIDate 2018-03-16

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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
-Name IAS
-Number 24
-IssueDate 2018-01-01
-Paragraph 17
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_17_e&doctype=Standard
-URIDate 2018-03-16

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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]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2018-01-01
-Paragraph 17
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_17_a&doctype=Standard
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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
-Note Effective 2019-01-01
-Name IFRS
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_47_b&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_LeaseLiabilities
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Period Type:	instant

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2018-01-01
-Paragraph 47
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_47_b&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2018-01-01
-Paragraph 45
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45&doctype=Standard
-URIDate 2018-03-16

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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 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.

Name:	tu_DefinedBenefitPlansManagementAndAdministrativeServiceCharges
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The amount of derivative effect on compensation to key management personnel in the form of share-based payments, the derivative being used for the management of share-based compensation costs.

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.

Name:	tu_KeyManagerialPersonnelDeferredShareUnitsPaidOut
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The amount of liabilities accrued for deferred share units awarded to Key managerial personnel.

No definition available.

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Data Type:	xbrli:monetaryItemType
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The amount of liabilities accrued for restricted share units awarded to Key managerial personnel.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The amount of liabilities accrued for restricted stock units and deferred share units awarded to Key managerial personnel.

No definition available.

Name:	tu_KeyManagerialPersonnelLiabilitiesAccruedForRestrictedStockUnitsAndDeferredShareUnits
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

Name:	tu_KeyManagerialPersonnelLiabilitiesAccruedForRestrictedStockUnitsAndDeferredShareUnitsAbstract
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Data Type:	xbrli:stringItemType
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The amount of annual cash bonus as a percentage of base salary upon termination without cause.

No definition available.

Name:	tu_KeyManagerialPersonnelSeverancePaymentsAnnualCashBonusPercentage
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Period Type:	duration

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.

Name:	tu_KeyManagerialPersonnelSeverancePaymentsNumberOfMonthsBaseSalaryConsidered
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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

No definition available.

Name:	tu_NotionalValueOfInstrumentsOtherEquityInstrumentsGranted
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

Name:	tu_TransactionsWithDefinedBenefitPensionPlansAbstract
Namespace Prefix:	tu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	tu_TransactionsWithRealEstateJointVenturesAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
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Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
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Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=tu_KeyManagementPersonnelRestrictedStockUnitsRSUMember
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Data Type:	na
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Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=tu_DirectorsDeferredShareUnitPlanMember
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