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COMMITMENTS AND CONTINGENT LIABILITIES - Narrative (Details) - CAD CAD in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Disclosure of finance lease and operating lease by lessee [line items] |  |
Rent expense on operating lease | CAD 228 | CAD 223
Contractual commitments for acquisition of property, plant and equipment | 298 |
Contractual commitments for acquisition of intangible assets | 141 |
Contractual commitments related to associates and joint ventures | CAD 494 |
Minimum |  |
Disclosure of finance lease and operating lease by lessee [line items] |  |
Term of operating lease | 5 years |
Maximum |  |
Disclosure of finance lease and operating lease by lessee [line items] |  |
Term of operating lease | 15 years |

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- Definition The commitments that the entity has relating to its joint ventures as specified in paragraphs B18-B20 of IFRS 12. [Refer: Joint ventures [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph 23 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_23_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of contingent rents recognised as an expense for operating leases. [Refer: Contingent rents recognised as expense] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2017-01-01 -Paragraph 35 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_35_c&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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- Definition The amount of contractual commitments for the acquisition of intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 122 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_122_e&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of contractual commitments for the acquisition of property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 74 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_74_c&doctype=Standard -URIDate 2017-03-09 + Details
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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 Term Of Material Leasing Arrangements By Lessee Classified As Operating Lease + References No definition available. + Details
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