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Debt - Summary of Debt Continuity (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 CAD ($)
Financial Instruments [Abstract] |  |  |  |
Borrowings at beginning of period | $ 5,816 | $ 7,374 | $ 4,913 | $ 6,255
Cash flows |  |  |  |
Proceeds from debt | 445 | 569 | 1,305 | 1,639
Redemption, purchase or repayment of debt | (1,026) | (1,323) | (124) | (155)
Revolving credit facilities | 0 | 0 | (262) | (335)
Non-cash changes |  |  |  |
Loss on debt redemption or purchase | 45 | 58 | 0 | 0
Changes in foreign exchange rates | 0 | 474 | 0 | (10)
Finance fees, discount amortization and other | 12 | 15 | (16) | (20)
Borrowings at end of period | $ 5,292 | $ 7,167 | $ 5,816 | $ 7,374

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- Definition The increase (decrease) in liabilities arising from financing activities resulting from the effect of changes in foreign exchange rates. [Refer: Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 44B -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_44B_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of liabilities for which cash flows were, or future cash flows will be, classified in the statement of cash flows as cash flows from financing activities. [Refer: Cash flows from (used in) financing activities; Liabilities] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 44D -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_44D&doctype=Standard -URIDate 2022-03-24 + Details
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