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Capital Disclosures -Summary of Reconciliation of Net Debt Plus Shareholders' Equity (Detail) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Jan. 01, 2023 | Dec. 31, 2022
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Disclosure of Reconciliation of Net debt to EBITDA ratio [Line Items] |  |  |  |  |
Long-term debt | $ 708 | $ 919 | $ 1,027 |  |
Cash and cash equivalents | (92) | (95) | (187) | [1] | $ (187)
Net debt | 616 | 824 | 840 |  |
Total shareholders' equity | 1,049 | 1,054 | 1,140 |  | $ 1,140
Total capital | $ 1,665 | $ 1,878 | $ 1,980 |  |
[1] | Effective January 1, 2024, the Company changed its presentation currency from Canadian dollars to United States dollars. Refer to Note 4 “Changes in Accounting Policies” for further details.

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