3.10.0.1 html 1053 625 1 false 202 0 false 13 false false R1.htm 00090 - Document - Document and Entity Information Sheet http://www.telus.com/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 00100 - Statement - Condensed interim consolidated statements of income and other comprehensive income (unaudited) Sheet http://www.telus.com/role/StatementCondensedInterimConsolidatedStatementsOfIncomeAndOtherComprehensiveIncomeUnaudited Condensed interim consolidated statements of income and other comprehensive income (unaudited) Statements 2 false false R3.htm 00200 - Statement - Condensed interim consolidated statements of financial position (unaudited) Sheet http://www.telus.com/role/StatementCondensedInterimConsolidatedStatementsOfFinancialPositionUnaudited Condensed interim consolidated statements of financial position (unaudited) Statements 3 false false R4.htm 00300 - Statement - Condensed interim consolidated statements of changes in owners' equity (unaudited) Sheet http://www.telus.com/role/StatementCondensedInterimConsolidatedStatementsOfChangesInOwnersEquityUnaudited Condensed interim consolidated statements of changes in owners' equity (unaudited) Statements 4 false false R5.htm 00400 - Statement - Condensed interim consolidated statements of cash flows (unaudited) Sheet http://www.telus.com/role/StatementCondensedInterimConsolidatedStatementsOfCashFlowsUnaudited Condensed interim consolidated statements of cash flows (unaudited) Statements 5 false false R6.htm 10101 - Disclosure - condensed interim consolidated financial statements Sheet http://www.telus.com/role/DisclosureCondensedInterimConsolidatedFinancialStatements condensed interim consolidated financial statements Notes 6 false false R7.htm 10201 - Disclosure - accounting policy developments Sheet http://www.telus.com/role/DisclosureAccountingPolicyDevelopments accounting policy developments Notes 7 false false R8.htm 10301 - Disclosure - capital structure financial policies Sheet http://www.telus.com/role/DisclosureCapitalStructureFinancialPolicies capital structure financial policies Notes 8 false false R9.htm 10401 - Disclosure - financial instruments Sheet http://www.telus.com/role/DisclosureFinancialInstruments financial instruments Notes 9 false false R10.htm 10501 - Disclosure - segment information Sheet http://www.telus.com/role/DisclosureSegmentInformation segment information Notes 10 false false R11.htm 10601 - Disclosure - revenue from contracts with customers Sheet http://www.telus.com/role/DisclosureRevenueFromContractsWithCustomers revenue from contracts with customers Notes 11 false false R12.htm 10701 - Disclosure - other operating income Sheet http://www.telus.com/role/DisclosureOtherOperatingIncome other operating income Notes 12 false false R13.htm 10801 - Disclosure - employee benefits expense Sheet http://www.telus.com/role/DisclosureEmployeeBenefitsExpense employee benefits expense Notes 13 false false R14.htm 10901 - Disclosure - financing costs Sheet http://www.telus.com/role/DisclosureFinancingCosts financing costs Notes 14 false false R15.htm 11001 - Disclosure - income taxes Sheet http://www.telus.com/role/DisclosureIncomeTaxes income taxes Notes 15 false false R16.htm 11101 - Disclosure - other comprehensive income Sheet http://www.telus.com/role/DisclosureOtherComprehensiveIncome other comprehensive income Notes 16 false false R17.htm 11201 - Disclosure - per share amounts Sheet http://www.telus.com/role/DisclosurePerShareAmounts per share amounts Notes 17 false false R18.htm 11301 - Disclosure - dividends per share Sheet http://www.telus.com/role/DisclosureDividendsPerShare dividends per share Notes 18 false false R19.htm 11401 - Disclosure - share-based compensation Sheet http://www.telus.com/role/DisclosureShareBasedCompensation share-based compensation Notes 19 false false R20.htm 11501 - Disclosure - employee future benefits Sheet http://www.telus.com/role/DisclosureEmployeeFutureBenefits employee future benefits Notes 20 false false R21.htm 11601 - Disclosure - restructuring and other costs Sheet http://www.telus.com/role/DisclosureRestructuringAndOtherCosts restructuring and other costs Notes 21 false false R22.htm 11701 - Disclosure - property, plant and equipment Sheet http://www.telus.com/role/DisclosurePropertyPlantAndEquipment property, plant and equipment Notes 22 false false R23.htm 11801 - Disclosure - intangible assets and goodwill Sheet http://www.telus.com/role/DisclosureIntangibleAssetsAndGoodwill intangible assets and goodwill Notes 23 false false R24.htm 11901 - Disclosure - leases Sheet http://www.telus.com/role/DisclosureLeases leases Notes 24 false false R25.htm 12001 - Disclosure - other long-term assets Sheet http://www.telus.com/role/DisclosureOtherLongTermAssets other long-term assets Notes 25 false false R26.htm 12101 - Disclosure - real estate joint ventures Sheet http://www.telus.com/role/DisclosureRealEstateJointVentures real estate joint ventures Notes 26 false false R27.htm 12201 - Disclosure - short-term borrowings Sheet http://www.telus.com/role/DisclosureShortTermBorrowings short-term borrowings Notes 27 false false R28.htm 12301 - Disclosure - accounts payable and accrued liabilities Sheet http://www.telus.com/role/DisclosureAccountsPayableAndAccruedLiabilities accounts payable and accrued liabilities Notes 28 false false R29.htm 12401 - Disclosure - advance billings and customer deposits Sheet http://www.telus.com/role/DisclosureAdvanceBillingsAndCustomerDeposits advance billings and customer deposits Notes 29 false false R30.htm 12501 - Disclosure - provisions Sheet http://www.telus.com/role/DisclosureProvisions provisions Notes 30 false false R31.htm 12601 - Disclosure - long-term debt Sheet http://www.telus.com/role/DisclosureLongTermDebt long-term debt Notes 31 false false R32.htm 12701 - Disclosure - other long-term liabilities Sheet http://www.telus.com/role/DisclosureOtherLongTermLiabilities other long-term liabilities Notes 32 false false R33.htm 12801 - Disclosure - Common Share capital Sheet http://www.telus.com/role/DisclosureCommonShareCapital Common Share capital Notes 33 false false R34.htm 12901 - Disclosure - contingent liabilities Sheet http://www.telus.com/role/DisclosureContingentLiabilities contingent liabilities Notes 34 false false R35.htm 13001 - Disclosure - related party transactions Sheet http://www.telus.com/role/DisclosureRelatedPartyTransactions related party transactions Notes 35 false false R36.htm 13101 - Disclosure - additional statement of cash flow information Sheet http://www.telus.com/role/DisclosureAdditionalStatementOfCashFlowInformation additional statement of cash flow information Notes 36 false false R37.htm 20102 - Disclosure - condensed interim consolidated financial statements (Policies) Sheet http://www.telus.com/role/DisclosureCondensedInterimConsolidatedFinancialStatementsPolicies condensed interim consolidated financial statements (Policies) Policies 37 false false R38.htm 30203 - Disclosure - accounting policy developments (Tables) Sheet http://www.telus.com/role/DisclosureAccountingPolicyDevelopmentsTables accounting policy developments (Tables) Tables http://www.telus.com/role/DisclosureAccountingPolicyDevelopments 38 false false R39.htm 30303 - Disclosure - capital structure financial policies (Tables) Sheet http://www.telus.com/role/DisclosureCapitalStructureFinancialPoliciesTables capital structure financial policies (Tables) Tables http://www.telus.com/role/DisclosureCapitalStructureFinancialPolicies 39 false false R40.htm 30403 - Disclosure - financial instruments (Tables) Sheet http://www.telus.com/role/DisclosureFinancialInstrumentsTables financial instruments (Tables) Tables http://www.telus.com/role/DisclosureFinancialInstruments 40 false false R41.htm 30503 - Disclosure - segment information (Tables) Sheet http://www.telus.com/role/DisclosureSegmentInformationTables segment information (Tables) Tables http://www.telus.com/role/DisclosureSegmentInformation 41 false false R42.htm 30603 - Disclosure - revenue from contracts with customers (Tables) Sheet http://www.telus.com/role/DisclosureRevenueFromContractsWithCustomersTables revenue from contracts with customers (Tables) Tables http://www.telus.com/role/DisclosureRevenueFromContractsWithCustomers 42 false false R43.htm 30703 - Disclosure - other operating income (Tables) Sheet http://www.telus.com/role/DisclosureOtherOperatingIncomeTables other operating income (Tables) Tables http://www.telus.com/role/DisclosureOtherOperatingIncome 43 false false R44.htm 30803 - Disclosure - employee benefits expense (Tables) Sheet http://www.telus.com/role/DisclosureEmployeeBenefitsExpenseTables employee benefits expense (Tables) Tables http://www.telus.com/role/DisclosureEmployeeBenefitsExpense 44 false false R45.htm 30903 - Disclosure - financing costs (Tables) Sheet http://www.telus.com/role/DisclosureFinancingCostsTables financing costs (Tables) Tables http://www.telus.com/role/DisclosureFinancingCosts 45 false false R46.htm 31003 - Disclosure - income taxes (Tables) Sheet http://www.telus.com/role/DisclosureIncomeTaxesTables income taxes (Tables) Tables http://www.telus.com/role/DisclosureIncomeTaxes 46 false false R47.htm 31103 - Disclosure - other comprehensive income (Tables) Sheet http://www.telus.com/role/DisclosureOtherComprehensiveIncomeTables other comprehensive income (Tables) Tables http://www.telus.com/role/DisclosureOtherComprehensiveIncome 47 false false R48.htm 31203 - Disclosure - per share amounts (Tables) Sheet http://www.telus.com/role/DisclosurePerShareAmountsTables per share amounts (Tables) Tables http://www.telus.com/role/DisclosurePerShareAmounts 48 false false R49.htm 31303 - Disclosure - dividends per share (Tables) Sheet http://www.telus.com/role/DisclosureDividendsPerShareTables dividends per share (Tables) Tables http://www.telus.com/role/DisclosureDividendsPerShare 49 false false R50.htm 31403 - Disclosure - share-based compensation (Tables) Sheet http://www.telus.com/role/DisclosureShareBasedCompensationTables share-based compensation (Tables) Tables http://www.telus.com/role/DisclosureShareBasedCompensation 50 false false R51.htm 31503 - Disclosure - employee future benefits (Tables) Sheet http://www.telus.com/role/DisclosureEmployeeFutureBenefitsTables employee future benefits (Tables) Tables http://www.telus.com/role/DisclosureEmployeeFutureBenefits 51 false false R52.htm 31603 - Disclosure - restructuring and other costs (Tables) Sheet http://www.telus.com/role/DisclosureRestructuringAndOtherCostsTables restructuring and other costs (Tables) Tables http://www.telus.com/role/DisclosureRestructuringAndOtherCosts 52 false false R53.htm 31703 - Disclosure - property, plant and equipment (Tables) Sheet http://www.telus.com/role/DisclosurePropertyPlantAndEquipmentTables property, plant and equipment (Tables) Tables http://www.telus.com/role/DisclosurePropertyPlantAndEquipment 53 false false R54.htm 31803 - Disclosure - intangible assets and goodwill (Tables) Sheet http://www.telus.com/role/DisclosureIntangibleAssetsAndGoodwillTables intangible assets and goodwill (Tables) Tables http://www.telus.com/role/DisclosureIntangibleAssetsAndGoodwill 54 false false R55.htm 32003 - Disclosure - other long-term assets (Tables) Sheet http://www.telus.com/role/DisclosureOtherLongTermAssetsTables other long-term assets (Tables) Tables http://www.telus.com/role/DisclosureOtherLongTermAssets 55 false false R56.htm 32103 - Disclosure - real estate joint ventures (Tables) Sheet http://www.telus.com/role/DisclosureRealEstateJointVenturesTables real estate joint ventures (Tables) Tables http://www.telus.com/role/DisclosureRealEstateJointVentures 56 false false R57.htm 32303 - Disclosure - accounts payable and accrued liabilities (Tables) Sheet http://www.telus.com/role/DisclosureAccountsPayableAndAccruedLiabilitiesTables accounts payable and accrued liabilities (Tables) Tables http://www.telus.com/role/DisclosureAccountsPayableAndAccruedLiabilities 57 false false R58.htm 32403 - Disclosure - advance billings and customer deposits (Tables) Sheet http://www.telus.com/role/DisclosureAdvanceBillingsAndCustomerDepositsTables advance billings and customer deposits (Tables) Tables http://www.telus.com/role/DisclosureAdvanceBillingsAndCustomerDeposits 58 false false R59.htm 32503 - Disclosure - provisions (Tables) Sheet http://www.telus.com/role/DisclosureProvisionsTables provisions (Tables) Tables http://www.telus.com/role/DisclosureProvisions 59 false false R60.htm 32603 - Disclosure - long-term debt (Tables) Sheet http://www.telus.com/role/DisclosureLongTermDebtTables long-term debt (Tables) Tables http://www.telus.com/role/DisclosureLongTermDebt 60 false false R61.htm 32703 - Disclosure - other long-term liabilities (Tables) Sheet http://www.telus.com/role/DisclosureOtherLongTermLiabilitiesTables other long-term liabilities (Tables) Tables http://www.telus.com/role/DisclosureOtherLongTermLiabilities 61 false false R62.htm 32803 - Disclosure - Common Share capital (Tables) Sheet http://www.telus.com/role/DisclosureCommonShareCapitalTables Common Share capital (Tables) Tables http://www.telus.com/role/DisclosureCommonShareCapital 62 false false R63.htm 33003 - Disclosure - related party transactions (Tables) Sheet http://www.telus.com/role/DisclosureRelatedPartyTransactionsTables related party transactions (Tables) Tables http://www.telus.com/role/DisclosureRelatedPartyTransactions 63 false false R64.htm 33103 - Disclosure - additional statement of cash flow information (Tables) Sheet http://www.telus.com/role/DisclosureAdditionalStatementOfCashFlowInformationTables additional statement of cash flow information (Tables) Tables http://www.telus.com/role/DisclosureAdditionalStatementOfCashFlowInformation 64 false false R65.htm 40101 - Disclosure - condensed interim consolidated financial statements (Details) Sheet http://www.telus.com/role/DisclosureCondensedInterimConsolidatedFinancialStatementsDetails condensed interim consolidated financial statements (Details) Details http://www.telus.com/role/DisclosureCondensedInterimConsolidatedFinancialStatementsPolicies 65 false false R66.htm 40201 - Disclosure - accounting policy developments - Impacts of application of IFRS 9 on carrying amount of portfolio investments (Details) Sheet http://www.telus.com/role/DisclosureAccountingPolicyDevelopmentsImpactsOfApplicationOfIfrs9OnCarryingAmountOfPortfolioInvestmentsDetails accounting policy developments - Impacts of application of IFRS 9 on carrying amount of portfolio investments (Details) Details 66 false false R67.htm 40202 - Disclosure - accounting policy developments - Impacts of application of IFRS 15, Consolidated statements of income and other comprehensive income (Details) Sheet http://www.telus.com/role/DisclosureAccountingPolicyDevelopmentsImpactsOfApplicationOfIfrs15ConsolidatedStatementsOfIncomeAndOtherComprehensiveIncomeDetails accounting policy developments - Impacts of application of IFRS 15, Consolidated statements of income and other comprehensive income (Details) Details 67 false false R68.htm 40203 - Disclosure - accounting policy developments - Impacts of application of IFRS 15, Consolidated statements of financial position (Details) Sheet http://www.telus.com/role/DisclosureAccountingPolicyDevelopmentsImpactsOfApplicationOfIfrs15ConsolidatedStatementsOfFinancialPositionDetails accounting policy developments - Impacts of application of IFRS 15, Consolidated statements of financial position (Details) Details 68 false false R69.htm 40204 - Disclosure - accounting policy developments - Impacts of application of IFRS 15, Consolidated statement of cash flows (Details) Sheet http://www.telus.com/role/DisclosureAccountingPolicyDevelopmentsImpactsOfApplicationOfIfrs15ConsolidatedStatementOfCashFlowsDetails accounting policy developments - Impacts of application of IFRS 15, Consolidated statement of cash flows (Details) Details 69 false false R70.htm 40301 - Disclosure - capital structure financial policies (Details) Sheet http://www.telus.com/role/DisclosureCapitalStructureFinancialPoliciesDetails capital structure financial policies (Details) Details http://www.telus.com/role/DisclosureCapitalStructureFinancialPoliciesTables 70 false false R71.htm 40401 - Disclosure - financial instruments - Credit risk (Details) Sheet http://www.telus.com/role/DisclosureFinancialInstrumentsCreditRiskDetails financial instruments - Credit risk (Details) Details 71 false false R72.htm 40402 - Disclosure - financial instruments - Accounts receivable (Details) Sheet http://www.telus.com/role/DisclosureFinancialInstrumentsAccountsReceivableDetails financial instruments - Accounts receivable (Details) Details 72 false false R73.htm 40403 - Disclosure - financial instruments - Contract assets (Details) Sheet http://www.telus.com/role/DisclosureFinancialInstrumentsContractAssetsDetails financial instruments - Contract assets (Details) Details 73 false false R74.htm 40404 - Disclosure - financial instruments - Liquidity risk (Details) Sheet http://www.telus.com/role/DisclosureFinancialInstrumentsLiquidityRiskDetails financial instruments - Liquidity risk (Details) Details 74 false false R75.htm 40405 - Disclosure - financial instruments - Market risks (Details) Sheet http://www.telus.com/role/DisclosureFinancialInstrumentsMarketRisksDetails financial instruments - Market risks (Details) Details 75 false false R76.htm 40406 - Disclosure - financial instruments - Fair Values Derivatives (Details) Sheet http://www.telus.com/role/DisclosureFinancialInstrumentsFairValuesDerivativesDetails financial instruments - Fair Values Derivatives (Details) Details 76 false false R77.htm 40407 - Disclosure - financial instruments - Fair values Non-derivative (Details) Sheet http://www.telus.com/role/DisclosureFinancialInstrumentsFairValuesNonDerivativeDetails financial instruments - Fair values Non-derivative (Details) Details 77 false false R78.htm 40408 - Disclosure - financial instruments - Derivative gains and losses (Details) Sheet http://www.telus.com/role/DisclosureFinancialInstrumentsDerivativeGainsAndLossesDetails financial instruments - Derivative gains and losses (Details) Details 78 false false R79.htm 40501 - Disclosure - segment information - Operating revenue (Details) Sheet http://www.telus.com/role/DisclosureSegmentInformationOperatingRevenueDetails segment information - Operating revenue (Details) Details 79 false false R80.htm 40502 - Disclosure - segment information - Income before income taxes (Details) Sheet http://www.telus.com/role/DisclosureSegmentInformationIncomeBeforeIncomeTaxesDetails segment information - Income before income taxes (Details) Details 80 false false R81.htm 40601 - Disclosure - revenue from contracts with customers - Revenues (Details) Sheet http://www.telus.com/role/DisclosureRevenueFromContractsWithCustomersRevenuesDetails revenue from contracts with customers - Revenues (Details) Details 81 false false R82.htm 40602 - Disclosure - revenue from contracts with customers - Accounts receivable (Details) Sheet http://www.telus.com/role/DisclosureRevenueFromContractsWithCustomersAccountsReceivableDetails revenue from contracts with customers - Accounts receivable (Details) Details 82 false false R83.htm 40603 - Disclosure - revenue from contracts with customers - Contract assets (Details) Sheet http://www.telus.com/role/DisclosureRevenueFromContractsWithCustomersContractAssetsDetails revenue from contracts with customers - Contract assets (Details) Details 83 false false R84.htm 40701 - Disclosure - other operating income (Details) Sheet http://www.telus.com/role/DisclosureOtherOperatingIncomeDetails other operating income (Details) Details http://www.telus.com/role/DisclosureOtherOperatingIncomeTables 84 false false R85.htm 40801 - Disclosure - employee benefits expense (Details) Sheet http://www.telus.com/role/DisclosureEmployeeBenefitsExpenseDetails employee benefits expense (Details) Details http://www.telus.com/role/DisclosureEmployeeBenefitsExpenseTables 85 false false R86.htm 40901 - Disclosure - financing costs (Details) Sheet http://www.telus.com/role/DisclosureFinancingCostsDetails financing costs (Details) Details http://www.telus.com/role/DisclosureFinancingCostsTables 86 false false R87.htm 41001 - Disclosure - income taxes - Expense composition (Details) Sheet http://www.telus.com/role/DisclosureIncomeTaxesExpenseCompositionDetails income taxes - Expense composition (Details) Details 87 false false R88.htm 41002 - Disclosure - income taxes - Reconciliations (Details) Sheet http://www.telus.com/role/DisclosureIncomeTaxesReconciliationsDetails income taxes - Reconciliations (Details) Details 88 false false R89.htm 41101 - Disclosure - other comprehensive income (Details) Sheet http://www.telus.com/role/DisclosureOtherComprehensiveIncomeDetails other comprehensive income (Details) Details http://www.telus.com/role/DisclosureOtherComprehensiveIncomeTables 89 false false R90.htm 41201 - Disclosure - per share amounts (Details) Sheet http://www.telus.com/role/DisclosurePerShareAmountsDetails per share amounts (Details) Details http://www.telus.com/role/DisclosurePerShareAmountsTables 90 false false R91.htm 41301 - Disclosure - dividends per share (Details) Sheet http://www.telus.com/role/DisclosureDividendsPerShareDetails dividends per share (Details) Details http://www.telus.com/role/DisclosureDividendsPerShareTables 91 false false R92.htm 41401 - Disclosure - share-based compensation - Expense (Details) Sheet http://www.telus.com/role/DisclosureShareBasedCompensationExpenseDetails share-based compensation - Expense (Details) Details 92 false false R93.htm 41402 - Disclosure - share-based compensation - Restricted stock units (Details) Sheet http://www.telus.com/role/DisclosureShareBasedCompensationRestrictedStockUnitsDetails share-based compensation - Restricted stock units (Details) Details 93 false false R94.htm 41403 - Disclosure - share-based compensation - TELUS Corp restricted stock units activity (Details) Sheet http://www.telus.com/role/DisclosureShareBasedCompensationTelusCorpRestrictedStockUnitsActivityDetails share-based compensation - TELUS Corp restricted stock units activity (Details) Details 94 false false R95.htm 41404 - Disclosure - share-based compensation - TELUS Corp restricted stock units vesting year (Details) Sheet http://www.telus.com/role/DisclosureShareBasedCompensationTelusCorpRestrictedStockUnitsVestingYearDetails share-based compensation - TELUS Corp restricted stock units vesting year (Details) Details 95 false false R96.htm 41405 - Disclosure - share-based compensation - TELUS International (Cda) Inc. restricted stock units (Details) Sheet http://www.telus.com/role/DisclosureShareBasedCompensationTelusInternationalCdaIncRestrictedStockUnitsDetails share-based compensation - TELUS International (Cda) Inc. restricted stock units (Details) Details 96 false false R97.htm 41406 - Disclosure - share-based compensation - Employee share purchase plan (Details) Sheet http://www.telus.com/role/DisclosureShareBasedCompensationEmployeeSharePurchasePlanDetails share-based compensation - Employee share purchase plan (Details) Details 97 false false R98.htm 41408 - Disclosure - share-based compensation - TELUS Corporation share options (Details) Sheet http://www.telus.com/role/DisclosureShareBasedCompensationTelusCorporationShareOptionsDetails share-based compensation - TELUS Corporation share options (Details) Details 98 false false R99.htm 41409 - Disclosure - share-based compensation - TELUS International (Cda) Inc. share options (Details) Sheet http://www.telus.com/role/DisclosureShareBasedCompensationTelusInternationalCdaIncShareOptionsDetails share-based compensation - TELUS International (Cda) Inc. share options (Details) Details 99 false false R100.htm 41501 - Disclosure - employee future benefits - Defined benefit pension plans expense (Details) Sheet http://www.telus.com/role/DisclosureEmployeeFutureBenefitsDefinedBenefitPensionPlansExpenseDetails employee future benefits - Defined benefit pension plans expense (Details) Details 100 false false R101.htm 41502 - Disclosure - employee future benefits - Defined contribution pension plans expense (Details) Sheet http://www.telus.com/role/DisclosureEmployeeFutureBenefitsDefinedContributionPensionPlansExpenseDetails employee future benefits - Defined contribution pension plans expense (Details) Details 101 false false R102.htm 41601 - Disclosure - restructuring and other costs (Details) Sheet http://www.telus.com/role/DisclosureRestructuringAndOtherCostsDetails restructuring and other costs (Details) Details http://www.telus.com/role/DisclosureRestructuringAndOtherCostsTables 102 false false R103.htm 41701 - Disclosure - property, plant and equipment (Details) Sheet http://www.telus.com/role/DisclosurePropertyPlantAndEquipmentDetails property, plant and equipment (Details) Details http://www.telus.com/role/DisclosurePropertyPlantAndEquipmentTables 103 false false R104.htm 41801 - Disclosure - intangible assets and goodwill (Details) Sheet http://www.telus.com/role/DisclosureIntangibleAssetsAndGoodwillDetails intangible assets and goodwill (Details) Details http://www.telus.com/role/DisclosureIntangibleAssetsAndGoodwillTables 104 false false R105.htm 41802 - Disclosure - intangible assets and goodwill - Business acquisitions (Details) Sheet http://www.telus.com/role/DisclosureIntangibleAssetsAndGoodwillBusinessAcquisitionsDetails intangible assets and goodwill - Business acquisitions (Details) Details 105 false false R106.htm 41803 - Disclosure - intangible assets and goodwill - Business acquisition pro forma information (Details) Sheet http://www.telus.com/role/DisclosureIntangibleAssetsAndGoodwillBusinessAcquisitionProFormaInformationDetails intangible assets and goodwill - Business acquisition pro forma information (Details) Details 106 false false R107.htm 41804 - Disclosure - intangible assets and goodwill - Business acquisitions - Prior period and subsequent to reporting period (Details) Sheet http://www.telus.com/role/DisclosureIntangibleAssetsAndGoodwillBusinessAcquisitionsPriorPeriodAndSubsequentToReportingPeriodDetails intangible assets and goodwill - Business acquisitions - Prior period and subsequent to reporting period (Details) Details 107 false false R108.htm 41901 - Disclosure - leases (Details) Sheet http://www.telus.com/role/DisclosureLeasesDetails leases (Details) Details http://www.telus.com/role/DisclosureLeases 108 false false R109.htm 42001 - Disclosure - other long-term assets - Summary (Details) Sheet http://www.telus.com/role/DisclosureOtherLongTermAssetsSummaryDetails other long-term assets - Summary (Details) Details 109 false false R110.htm 42002 - Disclosure - other long-term assets - Costs incurred to obtain and fulfill contracts with customers (Details) Sheet http://www.telus.com/role/DisclosureOtherLongTermAssetsCostsIncurredToObtainAndFulfillContractsWithCustomersDetails other long-term assets - Costs incurred to obtain and fulfill contracts with customers (Details) Details 110 false false R111.htm 42101 - Disclosure - real estate joint ventures - Summarized financial information (Details) Sheet http://www.telus.com/role/DisclosureRealEstateJointVenturesSummarizedFinancialInformationDetails real estate joint ventures - Summarized financial information (Details) Details 111 false false R112.htm 42102 - Disclosure - real estate joint ventures - Net income (loss) and comprehensive income (loss) (Details) Sheet http://www.telus.com/role/DisclosureRealEstateJointVenturesNetIncomeLossAndComprehensiveIncomeLossDetails real estate joint ventures - Net income (loss) and comprehensive income (loss) (Details) Details 112 false false R113.htm 42103 - Disclosure - real estate joint ventures - Investment activity (Details) Sheet http://www.telus.com/role/DisclosureRealEstateJointVenturesInvestmentActivityDetails real estate joint ventures - Investment activity (Details) Details 113 false false R114.htm 42104 - Disclosure - real estate joint ventures - Commitments and contingent liabilities (Details) Sheet http://www.telus.com/role/DisclosureRealEstateJointVenturesCommitmentsAndContingentLiabilitiesDetails real estate joint ventures - Commitments and contingent liabilities (Details) Details 114 false false R115.htm 42201 - Disclosure - short-term borrowings (Details) Sheet http://www.telus.com/role/DisclosureShortTermBorrowingsDetails short-term borrowings (Details) Details http://www.telus.com/role/DisclosureShortTermBorrowings 115 false false R116.htm 42301 - Disclosure - accounts payable and accrued liabilities (Details) Sheet http://www.telus.com/role/DisclosureAccountsPayableAndAccruedLiabilitiesDetails accounts payable and accrued liabilities (Details) Details http://www.telus.com/role/DisclosureAccountsPayableAndAccruedLiabilitiesTables 116 false false R117.htm 42401 - Disclosure - advance billings and customer deposits (Details) Sheet http://www.telus.com/role/DisclosureAdvanceBillingsAndCustomerDepositsDetails advance billings and customer deposits (Details) Details http://www.telus.com/role/DisclosureAdvanceBillingsAndCustomerDepositsTables 117 false false R118.htm 42402 - Disclosure - advance billings and customer deposits - Contract liabilities (Details) Sheet http://www.telus.com/role/DisclosureAdvanceBillingsAndCustomerDepositsContractLiabilitiesDetails advance billings and customer deposits - Contract liabilities (Details) Details 118 false false R119.htm 42403 - Disclosure - advance billings and customer deposits - Reconciliation of contract liabilities (Details) Sheet http://www.telus.com/role/DisclosureAdvanceBillingsAndCustomerDepositsReconciliationOfContractLiabilitiesDetails advance billings and customer deposits - Reconciliation of contract liabilities (Details) Details 119 false false R120.htm 42501 - Disclosure - provisions (Details) Sheet http://www.telus.com/role/DisclosureProvisionsDetails provisions (Details) Details http://www.telus.com/role/DisclosureProvisionsTables 120 false false R121.htm 42601 - Disclosure - long-term debt (Details) Sheet http://www.telus.com/role/DisclosureLongTermDebtDetails long-term debt (Details) Details http://www.telus.com/role/DisclosureLongTermDebtTables 121 false false R122.htm 42602 - Disclosure - long-term debt - TELUS Corporation notes (Details) Notes http://www.telus.com/role/DisclosureLongTermDebtTelusCorporationNotesDetails long-term debt - TELUS Corporation notes (Details) Details 122 false false R123.htm 42603 - Disclosure - long-term debt - TELUS Corporation commercial paper (Details) Sheet http://www.telus.com/role/DisclosureLongTermDebtTelusCorporationCommercialPaperDetails long-term debt - TELUS Corporation commercial paper (Details) Details 123 false false R124.htm 42604 - Disclosure - long-term debt - TELUS Corporation credit facility (Details) Sheet http://www.telus.com/role/DisclosureLongTermDebtTelusCorporationCreditFacilityDetails long-term debt - TELUS Corporation credit facility (Details) Details 124 false false R125.htm 42605 - Disclosure - long-term debt - TELUS International (Cda) Inc. credit facility (Details) Sheet http://www.telus.com/role/DisclosureLongTermDebtTelusInternationalCdaIncCreditFacilityDetails long-term debt - TELUS International (Cda) Inc. credit facility (Details) Details 125 false false R126.htm 42606 - Disclosure - long-term debt - Long-term debt maturities (Details) Sheet http://www.telus.com/role/DisclosureLongTermDebtLongTermDebtMaturitiesDetails long-term debt - Long-term debt maturities (Details) Details 126 false false R127.htm 42701 - Disclosure - other long-term liabilities (Details) Sheet http://www.telus.com/role/DisclosureOtherLongTermLiabilitiesDetails other long-term liabilities (Details) Details http://www.telus.com/role/DisclosureOtherLongTermLiabilitiesTables 127 false false R128.htm 42801 - Disclosure - Common Share capital (Details) Sheet http://www.telus.com/role/DisclosureCommonShareCapitalDetails Common Share capital (Details) Details http://www.telus.com/role/DisclosureCommonShareCapitalTables 128 false false R129.htm 42901 - Disclosure - contingent liabilities (Details) Sheet http://www.telus.com/role/DisclosureContingentLiabilitiesDetails contingent liabilities (Details) Details http://www.telus.com/role/DisclosureContingentLiabilities 129 false false R130.htm 43001 - Disclosure - related party transactions (Details) Sheet http://www.telus.com/role/DisclosureRelatedPartyTransactionsDetails related party transactions (Details) Details http://www.telus.com/role/DisclosureRelatedPartyTransactionsTables 130 false false R131.htm 43101 - Disclosure - additional statement of cash flow information (Details) Sheet http://www.telus.com/role/DisclosureAdditionalStatementOfCashFlowInformationDetails additional statement of cash flow information (Details) Details http://www.telus.com/role/DisclosureAdditionalStatementOfCashFlowInformationTables 131 false false R132.htm 43102 - Disclosure - additional statement of cash flow information - Financing activities (Details) Sheet http://www.telus.com/role/DisclosureAdditionalStatementOfCashFlowInformationFinancingActivitiesDetails additional statement of cash flow information - Financing activities (Details) Details 132 false false All Reports Book All Reports tu-20180630.xml tu-20180630.xsd tu-20180630_cal.xml tu-20180630_def.xml tu-20180630_lab.xml tu-20180630_pre.xml http://xbrl.sec.gov/dei/2014-01-31 http://fasb.org/us-gaap/2017-01-31 http://xbrl.sec.gov/currency/2017-01-31 http://xbrl.ifrs.org/taxonomy/2017-03-09/ifrs-full true true