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employee future benefits - Fair value measurements (Details) - Pension plans - CAD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Fair value measurements |  |
Asset-backed securities | $ 32 | $ 30
Cash, cash equivalents and other | 528 | 621
Real estate | 1,085 | 1,007
Fair value | 9,731 | 9,380
Effect of asset ceiling limit | (123) | (121)
Fair value after asset ceiling | 9,608 | 9,259
Fair value of administered pension benefit trusts | 2 | 2
Quoted prices in active markets for identical items |  |
Fair value measurements |  |
Cash, cash equivalents and other | 20 | 21
Fair value | 2,779 | 2,990
Other |  |
Fair value measurements |  |
Asset-backed securities | 32 | 30
Cash, cash equivalents and other | 508 | 600
Real estate | 1,085 | 1,007
Fair value | 6,952 | 6,390
Canadian |  |
Fair value measurements |  |
Equity securities | 1,044 | 979
Canadian | Quoted prices in active markets for identical items |  |
Fair value measurements |  |
Equity securities | 849 | 787
Canadian | Other |  |
Fair value measurements |  |
Equity securities | 195 | 192
Foreign |  |
Fair value measurements |  |
Equity securities | 2,699 | 2,405
Foreign | Quoted prices in active markets for identical items |  |
Fair value measurements |  |
Equity securities | 685 | 663
Foreign | Other |  |
Fair value measurements |  |
Equity securities | 2,014 | 1,742
Government securities |  |
Fair value measurements |  |
Debt securities | 1,453 | 1,698
Government securities | Quoted prices in active markets for identical items |  |
Fair value measurements |  |
Debt securities | 1,225 | 1,519
Government securities | Other |  |
Fair value measurements |  |
Debt securities | 228 | 179
Corporate debt securities |  |
Fair value measurements |  |
Debt securities | 2,087 | 1,628
Corporate debt securities | Other |  |
Fair value measurements |  |
Debt securities | 2,087 | 1,628
Commercial mortgages |  |
Fair value measurements |  |
Debt securities | 803 | 1,012
Commercial mortgages | Other |  |
Fair value measurements |  |
Debt securities | $ 803 | $ 1,012

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- Definition The amount securities that are backed by underlying assets contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 142 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_142_g&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount cash and cash equivalents contribute to the fair value of defined benefit plan assets. [Refer: Cash and cash equivalents; Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 142 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_142_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount instruments representing debt (rather than equity) contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 142 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_142_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount instruments representing equity (rather than debt) contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 142 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_142_b&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_57_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount real estate contributes to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 142 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_142_d&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The fair value of defined benefit plan assets, adjusted for any effect of limiting it to the asset ceiling. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. The asset ceiling is the present value of any economic benefits available in the form of refunds from the defined benefit plan or reductions in future contributions to the defined benefit plan. + References No definition available. + Details
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- Definition The fair value of assets of administered pension benefit trusts related to a legacy plan that was grandfathered prior to the merger between BC Telecom and TELUS Corporation. This plan holds no TELUS Common Shares, but holds debt of TELUS Corporation. + References No definition available. + Details
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