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Risk Management - Undiscounted Cash Outflows Relating to Financial Liabilities (Detail) - CAD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Accounts payable and accrued liabilities |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | $ 7,487 | $ 6,353
Accounts payable and accrued liabilities | Remainder of Year |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | 7,487 | 6,353
Short-Term Borrowings |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments |  | 79
Short-Term Borrowings | Remainder of Year |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments |  | 79
Long-Term Debt |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | 18,290 | 19,664
Long-Term Debt | Remainder of Year |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | 528 | 561
Long-Term Debt | Years 2 and 3 |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | 1,056 | 1,608
Long-Term Debt | Years 4 and 5 |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | 3,834 | 2,603
Long-Term Debt | Thereafter |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | 12,872 | 14,892
Contingent Payment |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments |  | 238
Contingent Payment | Remainder of Year |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments |  | 238
Contingent Payment | Years 2 and 3 |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments |  | 0
Lease Liabilities |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | 4,880 | 5,073
Lease Liabilities | Remainder of Year |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | 443 | 453
Lease Liabilities | Years 2 and 3 |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | 769 | 794
Lease Liabilities | Years 4 and 5 |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | 617 | 634
Lease Liabilities | Thereafter |  |
Disclosure of Maturity Analysis for Financial Liabilities [Line Items] |  |
Financial instruments | $ 3,051 | $ 3,192

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- Definition The amount of contractual undiscounted cash flows in relation to non-derivative financial liabilities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 39 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_39_a&doctype=Standard -URIDate 2021-03-24 + Details
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