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Investments in Associates and Joint Ventures - Summary of Investments in Associates and Joint Ventures (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure Of Joint Ventures And Associates [Line Items] |  |
Beginning balance | $ 1,060 | $ 1,067
Contributions | 4 | 5
Changes in foreign exchange rates | 73 | (5)
Share of loss (income) | 4 | (3)
Disposal of investment in associate | (1) |
Other | (1) | (4)
Ending balance | 1,139 | 1,060
NuevaUnión |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |
Beginning balance | 1,059 | 1,061
Contributions | 4 | 5
Changes in foreign exchange rates | 73 | (4)
Share of loss (income) | 4 | (3)
Disposal of investment in associate | 0 |
Other | (1) | 0
Ending balance | 1,139 | 1,059
Other | Other |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |
Beginning balance | 1 | 6
Contributions | 0 | 0
Changes in foreign exchange rates | 0 | (1)
Share of loss (income) | 0 | 0
Disposal of investment in associate | (1) |
Other | 0 | (4)
Ending balance | $ 0 | $ 1

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- Definition The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2022-03-24 -Paragraph 24 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2022-en-r&anchor=para_24_a&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 54 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_e&doctype=Standard -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2022-03-24 -Paragraph B16 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2022-en-r&anchor=para_B16&doctype=Appendix&subtype=B -URIDate 2022-03-24 + Details
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- Definition The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2022-03-24 -Paragraph 28 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2022-en-r&anchor=para_28_e&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2022-03-24 -Paragraph 23 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2022-en-r&anchor=para_23_g&doctype=Standard -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective on first application of IFRS 9 -Name IFRS -Number 4 -IssueDate 2022-03-24 -Paragraph 39M -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2022-en-b&anchor=para_39M_b&doctype=Standard -URIDate 2022-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 82 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_82_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The entity's share of the post-tax profit (loss) from discontinued operations of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Discontinued operations [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss) from discontinued operations] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2022-03-24 -Paragraph B16 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2022-en-r&anchor=para_B16_b&doctype=Appendix&subtype=B -URIDate 2022-03-24 + Details
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- Definition [Line Items] for Disclosure Of Joint Ventures And Associates [Table] + References No definition available. + Details
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