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Goodwill and Intangible Assets - Summary of Carrying Amounts of Goodwill and Intangible Assets (Parenthetical) (Detail) - CAD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Intangible assets ending balance | $ 4,233 | $ 4,127 | $ 4,223
Goodwill disposals | 65 |  |
Distribution networks [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Intangible assets ending balance | 868 | 989 | 1,093
Intangible assets disposals | 96 |  |
Customer relationships [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Intangible assets ending balance | 860 | 899 | 969
Software [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Intangible assets ending balance | 821 | 661 | 494
Other [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Intangible assets ending balance | 67 | 70 | 77
Fund management contracts and other [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Intangible assets ending balance | 798 | 755 | $ 785
US wealth and asset management [member] | Fund management contracts and other [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Intangible assets ending balance | 400 | 367 |
Canada wealth and asset management [member] | Fund management contracts and other [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Intangible assets ending balance | 273 | 273 |
U.S. [member] | Distribution networks [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Impairment | 27 |  |
Asia [member] | Distribution networks [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Impairment | 13 |  |
Gross Carrying Value [Member] | Distribution networks [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Gross carrying amount of finite life intangible assets | 1,331 | 1,294 |
Gross Carrying Value [Member] | Customer relationships [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Gross carrying amount of finite life intangible assets | 1,145 | 1,128 |
Gross Carrying Value [Member] | Software [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Gross carrying amount of finite life intangible assets | 2,110 | 1,841 |
Gross Carrying Value [Member] | Other [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items] |  |  |
Gross carrying amount of finite life intangible assets | $ 133 | $ 126 |

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- Definition The decrease in goodwill due to classification as held for sale. [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 iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B67_d_iv&doctype=Appendix&seq=2 -URIDate 2018-03-16 + Details
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- Definition The decrease in intangible assets other than goodwill resulting from disposals. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2018-01-01 -Paragraph 118 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2018-03-01&anchor=para_118_e_ii&doctype=Standard -URIDate 2018-03-16 + Details
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