XML 184 R155.htm IDEA: XBRL DOCUMENT v3.8.0.1

Employee Future Benefits - Summary of Weighted Average Duration of the Defined Benefit Obligations (Detail) - yr	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Pension plans [Member] | U.S. plans [Member]
Disclosure of defined benefit plans [Line Items]
Weighted average duration (in years) of the defined benefit obligations	9.5	9.2
Pension plans [Member] | Canadian plans [Member]
Disclosure of defined benefit plans [Line Items]
Weighted average duration (in years) of the defined benefit obligations	12.8	12.7
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	9.8	9.1
Retiree welfare plans [Member] | Canadian plans [Member]
Disclosure of defined benefit plans [Line Items]
Weighted average duration (in years) of the defined benefit obligations	14.2	14.2

X

- 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_
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Balance Type:	na
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X

- 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 2017-01-01
-Paragraph 147
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_147_c&doctype=Standard
-URIDate 2017-03-09

+ Details

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- Details

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X

- Details

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X

- Details

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X

- Details

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