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Financial Instruments and Risk Management - Fair Value Hierarchy (Details) - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financial Instruments and Risk Management |  |
Balance, at fair value | $ (20) | $ (65)
Accounts receivables |  |
Financial Instruments and Risk Management |  |
Financial assets, at fair value | 65 | 143
Accounts payable |  |
Financial Instruments and Risk Management |  |
Financial liabilities, at fair value | (85) | (208)
Level 1 |  |
Financial Instruments and Risk Management |  |
Balance, at fair value | (10) | (49)
Level 1 | Accounts receivables |  |
Financial Instruments and Risk Management |  |
Financial assets, at fair value | 41 | 36
Level 1 | Accounts payable |  |
Financial Instruments and Risk Management |  |
Financial liabilities, at fair value | (51) | (85)
Level 2 |  |
Financial Instruments and Risk Management |  |
Balance, at fair value | (10) | (16)
Level 2 | Accounts receivables |  |
Financial Instruments and Risk Management |  |
Financial assets, at fair value | 24 | 107
Level 2 | Accounts payable |  |
Financial Instruments and Risk Management |  |
Financial liabilities, at fair value | $ (34) | $ (123)

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- Definition The fair value of financial assets. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard -URIDate 2023-03-23 + Details
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