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Goodwill and Intangible Assets - Summary of Carrying Amounts of Goodwill and Intangible Assets (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |
Goodwill Beginning balance | $ 5,743 | $ 5,864
Total intangible assets Beginning balance | 4,232 | 4,233
Goodwill Net additions/ (disposals) | (5) | (6)
Total intangible assets Net additions/ (disposals) | 310 | 393
Effect of changes in foreign exchange rates | (24) | (115)
Goodwill Ending balance | 5,714 | 5,743
Total goodwill and intangible assets Net additions/ (disposals) | 305 | 387
Total goodwill and intangible assets Beginning balance | 9,975 | 10,097
Amortization expense | 289 | 271
Effect of changes in foreign exchange rates | (38) | (123)
Effect of changes in foreign exchange rates - Total intangible assets | (62) | (238)
Total goodwill and intangible assets Ending balance | 9,929 | 9,975
Total intangible assets Ending balance | 4,215 | 4,232
Distribution networks [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |
Total intangible assets Beginning balance | 801 | 868
Total intangible assets Net additions/ (disposals) | 59 | 6
Amortization expense | 42 | 44
Effect of changes in foreign exchange rates - Total intangible assets | (12) | (29)
Total intangible assets Ending balance | 806 | 801
Customer relationships [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |
Total intangible assets Beginning balance | 795 | 860
Total intangible assets Net additions/ (disposals) |  | (2)
Amortization expense | 54 | 54
Effect of changes in foreign exchange rates - Total intangible assets | (3) | (9)
Total intangible assets Ending balance | 738 | 795
Software [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |
Total intangible assets Beginning balance | 991 | 821
Total intangible assets Net additions/ (disposals) | 262 | 357
Amortization expense | 189 | 168
Effect of changes in foreign exchange rates - Total intangible assets | (5) | (19)
Total intangible assets Ending balance | 1,059 | 991
Other [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |
Total intangible assets Beginning balance | 61 | 67
Total intangible assets Net additions/ (disposals) | (9) |
Amortization expense | 4 | 5
Effect of changes in foreign exchange rates - Total intangible assets | 4 | (1)
Total intangible assets Ending balance | 52 | 61
Finite life intangible assets [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |
Total intangible assets Beginning balance | 2,648 | 2,616
Total intangible assets Net additions/ (disposals) | 312 | 361
Amortization expense | 289 | 271
Effect of changes in foreign exchange rates - Total intangible assets | (16) | (58)
Total intangible assets Ending balance | 2,655 | 2,648
Brand [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |
Total intangible assets Beginning balance | 779 | 819
Effect of changes in foreign exchange rates - Total intangible assets | (15) | (40)
Total intangible assets Ending balance | 764 | 779
Fund management contracts and other [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |
Total intangible assets Beginning balance | 805 | 798
Total intangible assets Net additions/ (disposals) | (2) | 32
Effect of changes in foreign exchange rates - Total intangible assets | (7) | (25)
Total intangible assets Ending balance | 796 | 805
Indefinite life intangible assets [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |
Total intangible assets Beginning balance | 1,584 | 1,617
Total intangible assets Net additions/ (disposals) | (2) | 32
Effect of changes in foreign exchange rates - Total intangible assets | (22) | (65)
Total intangible assets Ending balance | $ 1,560 | $ 1,584

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- Definition The amount of additional goodwill recognised, except goodwill included in a disposal group that, on acquisition, meets the criteria to be classified as held for sale in accordance with IFRS 5. [Refer: Goodwill; Disposal groups classified as held for sale [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2020-01-01 -Paragraph B67 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d_ii&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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- Definition The amount of amortisation expense. Amortisation is the systematic allocation of depreciable amounts of intangible assets over their useful lives. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph B67 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 134 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_134_a&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 135 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_135_a&doctype=Standard -URIDate 2020-01-01 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_c&doctype=Standard -URIDate 2020-01-01 + Details
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