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Leases - Additional Information (Details) $ in Millions, $ in Millions | Dec. 31, 2024 USD ($) | Dec. 31, 2024 CAD ($) | Dec. 31, 2023 CAD ($) | Dec. 31, 2022 CAD ($)
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Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |
Lease liabilities |  | $ 951 | $ 1,061 | $ 571
Right-of-use assets |  | 1,011 | 1,108 | $ 612
Subsidiaries | TAK |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |
Lease liabilities |  | 89 | 85 |
Subsidiaries | QBSA |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |
Lease liabilities |  | $ 465 | 428 |
Lease liability, percentage | 0.022 | 0.022 |  |
Right-of-use assets |  | $ 466 | $ 447 |
Subsidiaries | Between years 1 and 15 | TAK |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |
Lease liabilities annual payment | $ 6 |  |  |
Subsidiaries | Next 18 years, after year 1 | QBSA |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |
Lease liabilities annual payment | $ 23 |  |  |

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- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_b&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term that do not meet the definition of investment property. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_j&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_a&doctype=Standard -URIDate 2024-03-27 + Details
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