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Financial Instruments and Financial Risk Management - Summary of Contractual Undiscounted Cash Flow Requirements for Financial Liabilities (Detail) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about financial instruments [line items] |  |  |
Lease liabilities | $ 571 | $ 694 | $ 692
Interest on lease liabilities | 15 | $ 15 |
Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade accounts payable and other liabilities | 3,906 |  |
Debt (Note 19(f)) | 7,262 |  |
Lease liabilities | 745 |  |
Obligation to Neptune Bulk Terminals | 189 |  |
ENAMI preferential dividend liability | 368 |  |
Other liabilities | 130 |  |
Estimated interest payments on debt | 3,881 |  |
Interest on lease liabilities | 98 |  |
Liquidity risk | QB2 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Estimated interest payments on debt | 1,019 |  |
Liquidity risk | Joint ventures where entity is venturer [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Advances received | 2,293 |  |
QB2 variable consideration to IMSA | 135 |  |
Less Than 1 Year | Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade accounts payable and other liabilities | 3,906 |  |
Debt (Note 19(f)) | 616 |  |
Lease liabilities | 138 |  |
Obligation to Neptune Bulk Terminals | 0 |  |
ENAMI preferential dividend liability | 0 |  |
Other liabilities | 0 |  |
Estimated interest payments on debt | 417 |  |
Interest on lease liabilities | 16 |  |
Less Than 1 Year | Liquidity risk | QB2 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Estimated interest payments on debt | 0 |  |
Less Than 1 Year | Liquidity risk | Joint ventures where entity is venturer [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Advances received | 0 |  |
QB2 variable consideration to IMSA | 0 |  |
2–3 Years | Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade accounts payable and other liabilities | 0 |  |
Debt (Note 19(f)) | 796 |  |
Lease liabilities | 164 |  |
Obligation to Neptune Bulk Terminals | 28 |  |
ENAMI preferential dividend liability | 0 |  |
Other liabilities | 87 |  |
Estimated interest payments on debt | 729 |  |
Interest on lease liabilities | 22 |  |
2–3 Years | Liquidity risk | QB2 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Estimated interest payments on debt | 0 |  |
2–3 Years | Liquidity risk | Joint ventures where entity is venturer [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Advances received | 0 |  |
QB2 variable consideration to IMSA | 135 |  |
4–5 Years | Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade accounts payable and other liabilities | 0 |  |
Debt (Note 19(f)) | 1,101 |  |
Lease liabilities | 114 |  |
Obligation to Neptune Bulk Terminals | 28 |  |
ENAMI preferential dividend liability | 261 |  |
Other liabilities | 31 |  |
Estimated interest payments on debt | 590 |  |
Interest on lease liabilities | 17 |  |
4–5 Years | Liquidity risk | QB2 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Estimated interest payments on debt | 0 |  |
4–5 Years | Liquidity risk | Joint ventures where entity is venturer [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Advances received | 0 |  |
QB2 variable consideration to IMSA | 0 |  |
Thereafter | Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade accounts payable and other liabilities | 0 |  |
Debt (Note 19(f)) | 4,749 |  |
Lease liabilities | 329 |  |
Obligation to Neptune Bulk Terminals | 133 |  |
ENAMI preferential dividend liability | 107 |  |
Other liabilities | 12 |  |
Estimated interest payments on debt | 2,145 |  |
Interest on lease liabilities | 43 |  |
Thereafter | Liquidity risk | QB2 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Estimated interest payments on debt | 1,019 |  |
Thereafter | Liquidity risk | Joint ventures where entity is venturer [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Advances received | 2,293 |  |
QB2 variable consideration to IMSA | $ 0 |  |

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- Definition The amount of advances received representing contract liabilities for performance obligations satisfied at a point in time. [Refer: Contract liabilities; Performance obligations satisfied at point in time [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 78 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_78&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of contractual undiscounted cash flows in relation to bank borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph B11D -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_B11D&doctype=Appendix&subtype=B -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph IG31A -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_IG31A&doctype=Implementation%20Guidance -URIDate 2022-03-24 + Details
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