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Goodwill - Changes in carrying amounts of goodwill (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Goodwill at beginning of period | $ 10,604 |
Goodwill, end of period | 10,572 | $ 10,604
Discontinued operations |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Goodwill at beginning of period | 115 |
Goodwill, end of period |  | 115
BELL WIRELESS |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Goodwill at beginning of period | 3,046 |
Goodwill, end of period | 3,046 | 3,046
BELL WIRELINE |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Goodwill at beginning of period | 4,612 |
Goodwill, end of period | 4,580 | 4,612
BELL MEDIA |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Goodwill at beginning of period | 2,946 |
Goodwill, end of period | 2,946 | 2,946
Goodwill |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Goodwill at beginning of period |  | 10,667
Acquisitions and other | (26) | 52
Reclassified to assets held for sale | (6) |
Goodwill, end of period | 10,572 |
Goodwill | Discontinued operations |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Discontinued operations |  | (115)
Goodwill | BELL WIRELESS |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Goodwill at beginning of period | 3,046 | 3,046
Acquisitions and other | 0 | 0
Reclassified to assets held for sale | 0 |
Goodwill, end of period |  | 3,046
Goodwill | BELL WIRELESS | Discontinued operations |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Discontinued operations |  | 0
Goodwill | BELL WIRELINE |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Goodwill at beginning of period | 4,612 | 4,675
Acquisitions and other | (26) | 52
Reclassified to assets held for sale | (6) |
Goodwill, end of period |  | 4,612
Goodwill | BELL WIRELINE | Discontinued operations |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Discontinued operations |  | (115)
Goodwill | BELL MEDIA |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Goodwill at beginning of period | 2,946 | 2,946
Acquisitions and other | 0 | 0
Reclassified to assets held for sale | $ 0 |
Goodwill, end of period |  | 2,946
Goodwill | BELL MEDIA | Discontinued operations |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Discontinued operations |  | $ 0

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- Definition Acquisitions Through Business Combinations And Increase (Decrease) Through Other Changes, Intangible Assets And Goodwill + References No definition available. + Details
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- Definition The increase (decrease) in goodwill. [Refer: Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2021-01-01 -Paragraph B67 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B67_d&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
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- Definition The decrease in intangible assets and goodwill resulting from classification as held for sale or inclusion in a disposal group classified as held for sale. [Refer: Disposal groups classified as held for sale [member]; Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2021-01-01 -Paragraph 118 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2021-en-r&anchor=para_118_e_ii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2021-01-01 -Paragraph B67 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B67_d&doctype=Appendix&subtype=B -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2021-01-01 -Paragraph 134 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_134_a&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2021-01-01 -Paragraph 135 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_135_a&doctype=Standard -URIDate 2021-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_c&doctype=Standard -URIDate 2021-03-24 + Details
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