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Goodwill and Intangible Assets - Summary of Impairment Testing of Goodwill (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | $ 5,743 | $ 5,864
Goodwill Additions/ disposals | (5) | (6)
Effect of changes in foreign exchange rates | (24) | (115)
Goodwill Ending balance | 5,714 | 5,743
Asia Insurance, excluding Japan [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 159 | 165
Effect of changes in foreign exchange rates |  | (6)
Goodwill Ending balance | 159 | 159
Japan insurance [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 420 | 435
Effect of changes in foreign exchange rates | 13 | (15)
Goodwill Ending balance | 433 | 420
Canadian insurance [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 1,957 | 1,962
Effect of changes in foreign exchange rates | (2) | (5)
Goodwill Ending balance | 1,955 | 1,957
US insurance [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 349 | 367
Goodwill Additions/ disposals | (5) |
Effect of changes in foreign exchange rates | (6) | (18)
Goodwill Ending balance | 338 | 349
Asia wealth and asset management [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 187 | 196
Effect of changes in foreign exchange rates | (2) | (9)
Goodwill Ending balance | 185 | 187
Canada wealth and asset management [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 1,436 | 1,436
Goodwill Ending balance | 1,436 | 1,436
US wealth and asset management [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 1,235 | 1,303
Goodwill Additions/ disposals |  | (6)
Effect of changes in foreign exchange rates | (27) | (62)
Goodwill Ending balance | $ 1,208 | $ 1,235

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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 Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + 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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- Definition The increase (decrease) in goodwill resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2020-01-01 -Paragraph B67 -Subparagraph d -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d_vi&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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