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Supplemental Disclosure of Cash Flow Information - Supplemental Schedule Of Cash Flow Information (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Statement Of Cash Flows, Additional Disclosures [Abstract] |  |  |
Accounts receivable | $ (850) | $ 284 | $ (1,310)
Current income tax (liabilities) assets | 1,918 | (295) | (164)
Inventory | (487) | 98 | (194)
Prepaids and other | 39 | (56) | 2
Other long-term assets | 0 | (117) | 117
Accounts payable | 80 | (147) | 39
Accrued liabilities | 525 | (254) | 265
Other long-term liabilities | (154) | (62) | (23)
Net change in non-cash working capital, operating activities | 964 | (166) | (1,033)
Net change in non-cash working capital, investing activities | 107 | (383) | (235)
Net changes in non-cash working capital | 1,071 | (549) | (1,268)
Exploration and evaluation assets |  |  |
Expenditures on exploration and evaluation assets | 12 | 36 | 73
Net proceeds on sale of exploration and evaluation assets | (11) | (31) | 0
Net expenditures on exploration and evaluation assets | 1 | 5 | 73
Deferred purchase consideration payable | $ 48 | $ 72 | $ 95
Deferred purchase consideration payable, payable period | 2 years |  |

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- Definition The cash flows from (used in) the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource, classified as investing activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2021-01-01 -Paragraph 24 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2021-en-r&anchor=para_24_b&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The cash inflow from the disposal of exploration and evaluation assets. [Refer: Exploration and evaluation assets [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_16&doctype=Standard -URIDate 2021-03-24 + Details
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