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Capital Instruments - Additional Information (Detail) - CAD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Level 2 [Member] |  |
Fair value of capital instruments [line items] |  |
Capital instruments | $ 8,712 | $ 8,636

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- Definition The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_25&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Fair value of capital instruments [line items] + References No definition available. + Details
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- Details
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