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Property, Plant and Equipment - Summary of Property Plant and Equipment (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | $ 37,382 | $ 33,578
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 33,578 | 31,355
Additions | 4,843 | 4,306
Disposals | (24) | (67)
Impairment reversal | 215 |
Asset impairment |  | (1,244)
Depreciation and amortization | (1,869) | (1,608)
Transfers between classifications | 0 | 0
Decommissioning and restoration provisions change in estimate | 289 | 870
Capitalized borrowing costs | 370 | 251
Changes in foreign exchange rates | (20) | (285)
Closing net book value | 37,382 | 33,578
Net book value | 37,382 | 33,578
Exploration and Evaluation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 944 | 903
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 903 | 885
Additions | 45 | 22
Disposals | 0 | (1)
Impairment reversal | 0 |
Asset impairment |  | 0
Depreciation and amortization | 0 | 0
Transfers between classifications | 0 | 0
Decommissioning and restoration provisions change in estimate | 0 | 0
Capitalized borrowing costs | 0 | 0
Changes in foreign exchange rates | (4) | (3)
Closing net book value | 944 | 903
Mineral Properties |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 14,681 | 14,535
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 14,535 | 14,182
Additions | 0 | 0
Disposals | 0 | 0
Impairment reversal | 215 |
Asset impairment |  | (261)
Depreciation and amortization | (373) | (288)
Transfers between classifications | (50) | 65
Decommissioning and restoration provisions change in estimate | 250 | 814
Capitalized borrowing costs | 115 | 84
Changes in foreign exchange rates | (11) | (61)
Closing net book value | 14,681 | 14,535
Land, Buildings, Plant and Equipment |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 9,138 | 7,577
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 7,577 | 8,352
Additions | 181 | 368
Disposals | (6) | (54)
Impairment reversal | 0 |
Asset impairment |  | (983)
Depreciation and amortization | (802) | (774)
Transfers between classifications | 2,162 | 652
Decommissioning and restoration provisions change in estimate | 39 | 56
Capitalized borrowing costs | 0 | 0
Changes in foreign exchange rates | (13) | (40)
Closing net book value | 9,138 | 7,577
Capitalized Production Stripping Costs |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 2,688 | 2,644
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 2,644 | 2,644
Additions | 740 | 563
Disposals | 0 | (5)
Impairment reversal | 0 |
Asset impairment |  | 0
Depreciation and amortization | (694) | (546)
Transfers between classifications | 0 | 0
Decommissioning and restoration provisions change in estimate | 0 | 0
Capitalized borrowing costs | 0 | 0
Changes in foreign exchange rates | (2) | (12)
Closing net book value | 2,688 | 2,644
Construction In Progress |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 9,931 | 7,919
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 7,919 | 5,292
Additions | 3,877 | 3,353
Disposals | (18) | (7)
Impairment reversal | 0 |
Asset impairment |  | 0
Depreciation and amortization | 0 | 0
Transfers between classifications | (2,112) | (717)
Decommissioning and restoration provisions change in estimate | 0 | 0
Capitalized borrowing costs | 255 | 167
Changes in foreign exchange rates | 10 | (169)
Closing net book value | 9,931 | 7,919
Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 58,287 | 52,900
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 52,900 | 49,356
Closing net book value | 58,287 | 52,900
Cost | Exploration and Evaluation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 944 | 903
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 903 | 885
Closing net book value | 944 | 903
Cost | Mineral Properties |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 21,362 | 20,758
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 20,758 | 20,155
Closing net book value | 21,362 | 20,758
Cost | Land, Buildings, Plant and Equipment |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 18,716 | 16,722
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 16,722 | 16,951
Closing net book value | 18,716 | 16,722
Cost | Capitalized Production Stripping Costs |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 7,334 | 6,598
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 6,598 | 6,073
Closing net book value | 7,334 | 6,598
Cost | Construction In Progress |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 9,931 | 7,919
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 7,919 | 5,292
Closing net book value | 9,931 | 7,919
Accumulated depreciation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | (20,905) | (19,322)
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | (19,322) | (18,001)
Closing net book value | (20,905) | (19,322)
Accumulated depreciation | Exploration and Evaluation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 0 | 0
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 0 | 0
Closing net book value | 0 | 0
Accumulated depreciation | Mineral Properties |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | (6,681) | (6,223)
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | (6,223) | (5,973)
Closing net book value | (6,681) | (6,223)
Accumulated depreciation | Land, Buildings, Plant and Equipment |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | (9,578) | (9,145)
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | (9,145) | (8,599)
Closing net book value | (9,578) | (9,145)
Accumulated depreciation | Capitalized Production Stripping Costs |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | (4,646) | (3,954)
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | (3,954) | (3,429)
Closing net book value | (4,646) | (3,954)
Accumulated depreciation | Construction In Progress |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Net book value | 0 | 0
Reconciliation of changes in property, plant and equipment [abstract] |  |
Opening net book value | 0 | 0
Closing net book value | $ 0 | $ 0

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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_vii&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 75 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_75_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The decrease in property, plant and equipment resulting from disposals. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_ii&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 73 -Subparagraph e -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_v&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_98_a&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 73 -Subparagraph e -Clause viii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_viii&doctype=Standard -URIDate 2021-03-24 + Details
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