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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, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items] |  |  |
Lease liabilities | $ 694 | $ 692 | $ 672
Interest on lease liabilities (Note 19(c)) | 35 | $ 37 |
Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade accounts payable and other liabilities | 3,045 |  |
Debt (Note 18(f)) | 7,487 |  |
Lease liabilities | 1,128 |  |
Obligation to Neptune Bulk Terminals | 170 |  |
ENAMI preferential dividend liability | 105 |  |
Other liabilities | 232 |  |
Estimated interest payments on debt | 4,408 |  |
Interest on lease liabilities (Note 19(c)) | 82 |  |
Liquidity risk | QB2 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Estimated interest payments on debt | 1,753 |  |
Liquidity risk | Joint ventures where entity is venturer [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Advances received | 1,271 |  |
QB2 variable consideration to IMSA | 126 |  |
Less Than 1 Year | Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade accounts payable and other liabilities | 3,045 |  |
Debt (Note 18(f)) | 213 |  |
Lease liabilities | 154 |  |
Obligation to Neptune Bulk Terminals | 0 |  |
ENAMI preferential dividend liability | 0 |  |
Other liabilities | 0 |  |
Estimated interest payments on debt | 277 |  |
Interest on lease liabilities (Note 19(c)) | 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 18(f)) | 808 |  |
Lease liabilities | 191 |  |
Obligation to Neptune Bulk Terminals | 26 |  |
ENAMI preferential dividend liability | 43 |  |
Other liabilities | 139 |  |
Estimated interest payments on debt | 623 |  |
Interest on lease liabilities (Note 19(c)) | 24 |  |
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 | 63 |  |
4–5 Years | Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade accounts payable and other liabilities | 0 |  |
Debt (Note 18(f)) | 872 |  |
Lease liabilities | 172 |  |
Obligation to Neptune Bulk Terminals | 144 |  |
ENAMI preferential dividend liability | 16 |  |
Other liabilities | 56 |  |
Estimated interest payments on debt | 601 |  |
Interest on lease liabilities (Note 19(c)) | 12 |  |
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 | 63 |  |
Thereafter | Liquidity risk |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Trade accounts payable and other liabilities | 0 |  |
Debt (Note 18(f)) | 5,594 |  |
Lease liabilities | 611 |  |
Obligation to Neptune Bulk Terminals | 0 |  |
ENAMI preferential dividend liability | 46 |  |
Other liabilities | 37 |  |
Estimated interest payments on debt | 2,907 |  |
Interest on lease liabilities (Note 19(c)) | 30 |  |
Thereafter | Liquidity risk | QB2 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Estimated interest payments on debt | 1,753 |  |
Thereafter | Liquidity risk | Joint ventures where entity is venturer [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Advances received | 1,271 |  |
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 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 78 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_78&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph B11D -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_B11D&doctype=Appendix&subtype=B -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph IG31A -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_IG31A&doctype=Implementation%20Guidance -URIDate 2021-03-24 + Details
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