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Goodwill and Intangible Assets - Changes in Intangible Assets (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | $ 2,083 |
Amortization charge for the year | (156) | $ (137)
Impairment of intangible assets | (11) | (15)
Intangible assets, ending balance | 2,477 | 2,083
Gross carrying amount |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 3,094 | 2,661
Additions | 230 | 266
Acquisitions | 358 | 238
Foreign exchange rate movements | (31) | (71)
Disposals | (9) |
Intangible assets, ending balance | 3,642 | 3,094
Accumulated amortization and impairment losses |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | (1,011) | (882)
Foreign exchange rate movements | 13 | 23
Amortization charge for the year | (156) | (137)
Impairment of intangible assets | (11) | (15)
Intangible assets, ending balance | (1,165) | (1,011)
Indefinite life intangible assets |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 640 |
Intangible assets, ending balance | 924 | 640
Indefinite life intangible assets | Gross carrying amount |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 646 | 673
Additions | 0 | 0
Acquisitions | 295 | 0
Foreign exchange rate movements | (3) | (27)
Disposals | 0 |
Intangible assets, ending balance | 938 | 646
Indefinite life intangible assets | Accumulated amortization and impairment losses |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | (6) | (4)
Foreign exchange rate movements | 1 | 0
Amortization charge for the year | 0 | 0
Impairment of intangible assets | (9) | (2)
Intangible assets, ending balance | (14) | (6)
Finite life, Internally generated software |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 369 |
Intangible assets, ending balance | 509 | 369
Finite life, Internally generated software | Gross carrying amount |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 857 | 722
Additions | 230 | 151
Acquisitions | 0 | 0
Foreign exchange rate movements | (13) | (16)
Disposals | (4) |
Intangible assets, ending balance | 1,070 | 857
Finite life, Internally generated software | Accumulated amortization and impairment losses |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | (488) | (417)
Foreign exchange rate movements | 7 | 15
Amortization charge for the year | (78) | (73)
Impairment of intangible assets | (2) | (13)
Intangible assets, ending balance | (561) | (488)
Finite life, Other |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 1,074 |
Intangible assets, ending balance | 1,044 | 1,074
Finite life, Other | Gross carrying amount |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | 1,591 | 1,266
Additions | 0 | 115
Acquisitions | 63 | 238
Foreign exchange rate movements | (15) | (28)
Disposals | (5) |
Intangible assets, ending balance | 1,634 | 1,591
Finite life, Other | Accumulated amortization and impairment losses |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets, beginning balance | (517) | (461)
Foreign exchange rate movements | 5 | 8
Amortization charge for the year | (78) | (64)
Impairment of intangible assets | 0 | 0
Intangible assets, ending balance | $ (590) | $ (517)

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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 2019-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118_e_i&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118_e_i&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 118 -Subparagraph e -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118_e_vi&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 118 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118_e_ii&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 118 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118_e_vii&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 118 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118_e&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_c&doctype=Standard -URIDate 2019-03-27 + Details
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