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General and Administrative - Summary of General and Administrative Expenses (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
General And Administrative Expenses [Abstract] |  |  |  |  |
Salaries and Benefits | $ 264 | $ 145 |  | $ 143 |
Administrative and Other | 225 | 102 |  | 90 |
Stock-Based Compensation Expense (Recovery) (Note 32) | 159 | 49 |  | 67 |
Other Incentive Benefits Expense (Recovery) | 201 | (4) |  | 31 |
General and Administrative Expenses | $ 849 | $ 292 | [1] | $ 331 | [1]
[1] | See Note 3(w) for revisions to comparative results.

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- Definition The amount of expense relating to general and administrative activities of the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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