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Property, Plant and Equipment - Summary of Property Plant and Equipment (Details) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | $ 30,568 | $ 45,565 | $ 40,095
Additions | 3,142 | 6,510 |
Disposals | (63) | (55) |
Change from the NSC/POSCO transaction | 342 |  |
Sale of steelmaking coal business | (17,273) |  |
Depreciation and amortization | (2,441) | (2,080) |
Transfers between classifications | 0 | 0 |
Changes in decommissioning, restoration and other provisions | 30 | 931 |
Capitalized borrowing costs | 66 | 780 |
Changes in foreign exchange rates | 2,215 | (616) |
Asset impairments | (1,015) |  |
Exploration and Evaluation |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 1,955 | 1,565 | 991
Additions | 315 | 619 |
Disposals | (7) | (12) |
Change from the NSC/POSCO transaction | 0 |  |
Sale of steelmaking coal business | 0 |  |
Depreciation and amortization | 0 | 0 |
Transfers between classifications | 0 | 0 |
Changes in decommissioning, restoration and other provisions | 0 | (7) |
Capitalized borrowing costs | 0 | 0 |
Changes in foreign exchange rates | 82 | (26) |
Asset impairments | 0 |  |
Mineral Properties |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 4,879 | 14,270 | 13,290
Additions | 1 | 198 |
Disposals | (4) | (2) |
Change from the NSC/POSCO transaction | 115 |  |
Sale of steelmaking coal business | (9,609) |  |
Depreciation and amortization | (396) | (377) |
Transfers between classifications | 106 | 324 |
Changes in decommissioning, restoration and other provisions | 39 | 926 |
Capitalized borrowing costs | 0 | 0 |
Changes in foreign exchange rates | 357 | (89) |
Asset impairments | 0 |  |
Land, Buildings, Plant and Equipment |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 20,349 | 21,687 | 8,296
Additions | 533 | 864 |
Disposals | (50) | (34) |
Change from the NSC/POSCO transaction | 105 |  |
Sale of steelmaking coal business | (4,214) |  |
Depreciation and amortization | (1,459) | (964) |
Transfers between classifications | 3,217 | 13,787 |
Changes in decommissioning, restoration and other provisions | (9) | 18 |
Capitalized borrowing costs | 0 | 0 |
Changes in foreign exchange rates | 1,500 | (280) |
Asset impairments | (961) |  |
Capitalized Production Stripping Costs |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 2,030 | 3,682 | 3,248
Additions | 846 | 1,198 |
Disposals | 0 | 0 |
Change from the NSC/POSCO transaction | 83 |  |
Sale of steelmaking coal business | (2,090) |  |
Depreciation and amortization | (586) | (739) |
Transfers between classifications | 0 | 0 |
Changes in decommissioning, restoration and other provisions | 0 | 0 |
Capitalized borrowing costs | 0 | 0 |
Changes in foreign exchange rates | 95 | (25) |
Asset impairments | 0 |  |
Construction In Progress |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 1,355 | 4,361 | 14,270
Additions | 1,447 | 3,631 |
Disposals | (2) | (7) |
Change from the NSC/POSCO transaction | 39 |  |
Sale of steelmaking coal business | (1,360) |  |
Depreciation and amortization | 0 | 0 |
Transfers between classifications | (3,323) | (14,111) |
Changes in decommissioning, restoration and other provisions | 0 | (6) |
Capitalized borrowing costs | 66 | 780 |
Changes in foreign exchange rates | 181 | (196) |
Asset impairments | (54) |  |
Cost |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 44,028 | 68,889 | 62,735
Cost | Exploration and Evaluation |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 1,955 | 1,565 | 991
Cost | Mineral Properties |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 6,988 | 20,693 | 20,364
Cost | Land, Buildings, Plant and Equipment |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 29,313 | 32,532 | 18,514
Cost | Capitalized Production Stripping Costs |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 4,417 | 9,738 | 8,596
Cost | Construction In Progress |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 1,355 | 4,361 | 14,270
Accumulated depreciation |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | (13,460) | (23,324) | (22,640)
Accumulated depreciation | Exploration and Evaluation |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | 0 | 0 | 0
Accumulated depreciation | Mineral Properties |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | (2,109) | (6,423) | (7,074)
Accumulated depreciation | Land, Buildings, Plant and Equipment |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | (8,964) | (10,845) | (10,218)
Accumulated depreciation | Capitalized Production Stripping Costs |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | (2,387) | (6,056) | (5,348)
Accumulated depreciation | Construction In Progress |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value | $ 0 | $ 0 | $ 0

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- Definition The decrease in property, plant and equipment resulting from the loss of control of a subsidiary. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_vii&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 75 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_75_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_v&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 98 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_98_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in property, plant and equipment resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -Clause viii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_viii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. Note that right-of-use assets are not included. [Contrast: Property, plant and equipment including right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_a&doctype=Standard -URIDate 2024-03-27 + Details
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