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Goodwill and Intangible Assets - Changes in Intangible Assets (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | $ 1,667 |
Amortization charge for the year | 119 | $ 112
Intangible assets, ending balance | 1,779 | 1,667
Gross carrying amount |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 2,406 | 2,351
Additions | 117 | 86
Acquisitions | 22 | 61
Disposals, intangible assets other than goodwill |  | 3
Foreign exchange rate movements | 116 | (89)
Intangible assets, ending balance | 2,661 | 2,406
Accumulated amortization and impairment losses |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | (739) | (648)
Disposals, intangible assets other than goodwill |  | (3)
Foreign exchange rate movements | (24) | 18
Amortization charge for the year | (119) | (112)
Intangible assets, ending balance | (882) | (739)
Indefinite life intangible assets |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 621 |
Intangible assets, ending balance | 669 | 621
Indefinite life intangible assets | Gross carrying amount |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 625 | 661
Additions | 0 | 0
Acquisitions | 3 | 0
Disposals, intangible assets other than goodwill |  | 0
Foreign exchange rate movements | 45 | (36)
Intangible assets, ending balance | 673 | 625
Indefinite life intangible assets | Accumulated amortization and impairment losses |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | (4) | (4)
Disposals, intangible assets other than goodwill |  | 0
Foreign exchange rate movements | 0 | 0
Amortization charge for the year | 0 | 0
Intangible assets, ending balance | (4) | (4)
Finite life, Internally generated software |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 241 |
Intangible assets, ending balance | 305 | 241
Finite life, Internally generated software | Gross carrying amount |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 579 | 518
Additions | 118 | 81
Acquisitions | 0 | 0
Disposals, intangible assets other than goodwill |  | 3
Foreign exchange rate movements | 25 | (17)
Intangible assets, ending balance | 722 | 579
Finite life, Internally generated software | Accumulated amortization and impairment losses |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | (338) | (291)
Disposals, intangible assets other than goodwill |  | (3)
Foreign exchange rate movements | (13) | 9
Amortization charge for the year | (66) | (59)
Intangible assets, ending balance | (417) | (338)
Finite life, Other |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 805 |
Intangible assets, ending balance | 805 | 805
Finite life, Other | Gross carrying amount |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 1,202 | 1,172
Additions | (1) | 5
Acquisitions | 19 | 61
Disposals, intangible assets other than goodwill |  | 0
Foreign exchange rate movements | 46 | (36)
Intangible assets, ending balance | 1,266 | 1,202
Finite life, Other | Accumulated amortization and impairment losses |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | (397) | (353)
Disposals, intangible assets other than goodwill |  | 0
Foreign exchange rate movements | (11) | 9
Amortization charge for the year | (53) | (53)
Intangible assets, ending balance | $ (461) | $ (397)

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- Definition The increase in intangible assets other than goodwill resulting from acquisitions through business combinations. [Refer: Business combinations [member]; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118_e_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Business combinations [member]; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118_e_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of amortisation of intangible assets other than goodwill. [Refer: Depreciation and amortisation expense; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -Subparagraph e -Clause vi -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118_e_vi&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease in intangible assets other than goodwill resulting from disposals. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118_e_ii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in intangible assets other than goodwill resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118_e_vii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of identifiable non-monetary assets without physical substance. This amount does not include goodwill. [Refer: Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118_e&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_c&doctype=Standard -URIDate 2017-03-09 + Details
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