XML 184 R159.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Employee Future Benefits - Summary of Weighted Average Duration of the Defined Benefit Obligations (Detail) - yr | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Pension defined benefit plans [member] | U.S. plans [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Weighted average duration (in years) of the defined benefit obligations | 8.8 | 9.5
Pension defined benefit plans [member] | Canadian plans [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Weighted average duration (in years) of the defined benefit obligations | 12.4 | 12.8
Retiree welfare plans [Member] | U.S. plans [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Weighted average duration (in years) of the defined benefit obligations | 9.0 | 9.8
Retiree welfare plans [Member] | Canadian plans [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Weighted average duration (in years) of the defined benefit obligations | 14.3 | 14.2

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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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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 147 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_147_c&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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- Details
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- Details
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- Details
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