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Goodwill and Intangible Assets - Summary of Impairment Testing of Goodwill (Detail) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | $ 5,713 | $ 5,884
Goodwill Additions/ disposals | (65) |
Effect of changes in foreign exchange rates | 216 | (171)
Goodwill Ending balance | 5,864 | 5,713
Asia Insurance, excluding Japan [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 154 | 160
Effect of changes in foreign exchange rates | 11 | (6)
Goodwill Ending balance | 165 | 154
Japan insurance [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 391 | 403
Effect of changes in foreign exchange rates | 44 | (12)
Goodwill Ending balance | 435 | 391
Canadian insurance [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 1,954 | 1,960
Effect of changes in foreign exchange rates | 8 | (6)
Goodwill Ending balance | 1,962 | 1,954
US insurance [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 400 | 428
Goodwill Additions/ disposals | (65) |
Effect of changes in foreign exchange rates | 32 | (28)
Goodwill Ending balance | 367 | 400
Asia wealth and asset management [member] |  |
Disclosure of reconciliation of changes in goodwill [Line items] |  |
Goodwill Beginning balance | 180 | 194
Effect of changes in foreign exchange rates | 16 | (14)
Goodwill Ending balance | 196 | 180
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 | 1,198 | 1,303
Effect of changes in foreign exchange rates | 105 | (105)
Goodwill Ending balance | $ 1,303 | $ 1,198

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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 2018-01-01 -Paragraph B67 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B67_d_ii&doctype=Appendix&seq=2 -URIDate 2018-03-16 + 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 2018-01-01 -Paragraph B67 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B67_d&doctype=Appendix&seq=2 -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2018-01-01 -Paragraph 134 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_134_a&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2018-01-01 -Paragraph 135 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_135_a&doctype=Standard -URIDate 2018-03-16 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_c&doctype=Standard -URIDate 2018-03-16 + 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 2018-01-01 -Paragraph B67 -Subparagraph d -Clause vi -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B67_d_vi&doctype=Appendix&seq=2 -URIDate 2018-03-16 + Details
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