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Share-based payments - Share-based payment Amounts Included in the Income Statements as Operating Costs (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Total share-based payments | $ (81) | $ (90)
ESP |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Total share-based payments | (28) | (29)
RSUs/PSUs |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Total share-based payments | (44) | (49)
Other |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Total share-based payments | $ (9) | $ (12)

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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 expense arising from share-based payment transactions in which the goods or services received did not qualify for recognition as assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 51 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_51_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Details
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- Details
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- Details
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