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intangible assets and goodwill - Business acquisitions - Prior period and subsequent to reporting period (Details) - CAD ($) $ in Millions | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2018 | Feb. 14, 2019 | Jan. 14, 2019 | Aug. 31, 2017
Major business combination |  |  |  |
Business acquisition |  |  |  |
Cash transferred |  |  | $ 89 |
Issuance of TELUS Corporation Common Shares |  |  | $ 38 |
Major business combination | Minimum |  |  |  |
Business acquisition |  |  |  |
Initial provision for the net identifiable assets acquired |  | $ 30 |  |
Major business combination | Maximum |  |  |  |
Business acquisition |  |  |  |
Initial provision for the net identifiable assets acquired |  | $ 40 |  |
Voxpro Limited |  |  |  |
Business acquisition |  |  |  |
Ownership interest in businesses acquired (as a percentage) |  |  |  | 55.00%
Voxpro Limited | Goodwill |  |  |  |
Business acquisition |  |  |  |
Measurement period adjustment, increase | $ 19 |  |  |
Voxpro Limited | Provisions |  |  |  |
Business acquisition |  |  |  |
Measurement period adjustment, increase | $ 19 |  |  |

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- Definition The fair value, at acquisition date, of cash transferred as consideration in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2018-01-01 -Paragraph B64 -Subparagraph f -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B64_f_i&doctype=Appendix&seq=2 -URIDate 2018-03-16 + Details
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- Definition The fair value, at the acquisition date, of equity interests of the acquirer transferred as consideration in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2018-01-01 -Paragraph B64 -Subparagraph f -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B64_f_iv&doctype=Appendix&seq=2 -URIDate 2018-03-16 + Details
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- Definition The amount recognised as of the acquisition date for net identifiable assets acquired or liabilities assumed in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2018-01-01 -Paragraph B64 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B64_i&doctype=Appendix&seq=2 -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2018-01-01 -Paragraph IE72 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_IE72&doctype=Illustrative%20Examples -URIDate 2018-03-16 + Details
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- Definition The amount of measurement period adjustments recognised for particular assets, liabilities, non-controlling interests or items of consideration if the initial accounting for a business combination is incomplete. The measurement period is the period after the acquisition date during which the acquirer may adjust the provisional amounts recognised for a business combination. [Refer: Non-controlling interests; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2018-01-01 -Paragraph B67 -Subparagraph a -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B67_a_iii&doctype=Appendix&seq=2 -URIDate 2018-03-16 + Details
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