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Financial Instruments and Financial Risk Management - Summary of U.S. Dollar Financial Instruments Subject to Foreign Exchange Risk (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Maximum exposure to credit risk | $ 325 | $ (206)
Canada, Dollars | Currency risk | Cash and cash equivalents |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Maximum exposure to credit risk | 59 | 634
Canada, Dollars | Currency risk | Trade and settlement receivables |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Maximum exposure to credit risk | 1,145 | 629
Canada, Dollars | Currency risk | Trade accounts payable and other liabilities |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Maximum exposure to credit risk | 743 | 570
Canada, Dollars | Currency risk | Debt (Note 20) |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Maximum exposure to credit risk | 2,470 | 2,585
Reduced by: Debt designated as a hedging instrument in our net investment hedge | Canada, Dollars | Currency risk |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Maximum exposure to credit risk | $ 2,334 | $ 1,686

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