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Financial Instruments - Carrying Amounts and Classifications of Financial Assets and Liabilities (Details) - CAD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | $ 3,653 | $ 3,267
Cash equivalents | 0 | 0
Bank overdraft |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 16 |
Bank overdraft | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 16 |
Accounts payable and accrued liabilities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 1,346 | 689
Accounts payable and accrued liabilities | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 1,346 | 689
Dividends payable |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 68 | 62
Dividends payable | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 68 | 62
Credit facilities, long-term debt and lease liabilities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 3,653 | 3,267
Credit facilities, long-term debt and lease liabilities | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 3,653 | 3,267
Exchangeable securities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 739 | 735
Exchangeable securities | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 739 | 735
Within one year | Risk management liabilities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 1,129 | 261
Within one year | Derivatives | Risk management liabilities | Derivatives used for hedging |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 271 | 0
Within one year | Derivatives | Risk management liabilities | Derivatives held for trading (FVTPL) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 858 | 261
Later than one year | Risk management liabilities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 333 | 145
Later than one year | Derivatives | Risk management liabilities | Derivatives used for hedging |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 76 | 0
Later than one year | Derivatives | Risk management liabilities | Derivatives held for trading (FVTPL) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 257 | 145
Cash and cash equivalents |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1,134 | 947
Cash and cash equivalents | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1,134 | 947
Restricted cash |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 70 | 70
Restricted cash | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 70 | 70
Trade and other receivables |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1,589 | 651
Trade and other receivables | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1,589 | 651
Long-term portion of finance lease receivables |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 129 | 185
Long-term portion of finance lease receivables | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 129 | 185
Long-term portion of loan receivable |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 33 |
Long-term portion of loan receivable | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 33 |
Other investments |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 12 |
Other investments | Other financial assets (FVTPL) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 11 |
Other investments | Other financial assets (FVTOCI) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1 |
Risk management assets | Within one year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 709 | 308
Risk management assets | Later than one year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 161 | 399
Risk management assets | Derivatives used for hedging | Within one year | Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 36
Risk management assets | Derivatives used for hedging | Later than one year | Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 252
Risk management assets | Derivatives held for trading (FVTPL) | Within one year | Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 709 | 272
Risk management assets | Derivatives held for trading (FVTPL) | Later than one year | Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | $ 161 | $ 147

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- Definition The amount of short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_45&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35H&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35M&doctype=Standard -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35N&doctype=Standard -URIDate 2022-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35I&doctype=Standard -URIDate 2022-03-24 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard -URIDate 2022-03-24 + Details
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