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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, 2022 | Dec. 31, 2021
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Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Maximum exposure to credit risk | $ (206) | $ 222
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 | 634 | 664
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 | 629 | 1,042
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 | 570 | 703
Canada, Dollars | Currency risk | Debt (Note 19) |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Maximum exposure to credit risk | 2,585 | 3,478
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 | $ 1,686 | $ 2,697

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