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Changes in Accounting Policies - Summary of Change in Presentation Currency Resulted in Impact on the Year Ended, Consolidated Statements of Loss And Comprehensive Loss (Details) $ in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 CAD ($)
Statement Of Comprehensive Income Line Items |  |  |
Net earnings (loss) | $ 32 | $ (83) |
Total comprehensive loss | $ 4 | (77) |
Previously Reported [Member] |  |  |
Statement Of Comprehensive Income Line Items |  |  |
Net earnings (loss) |  |  | $ (111)
Total comprehensive loss |  |  | $ (138)
Presentation Currency Change [Member] |  |  |
Statement Of Comprehensive Income Line Items |  |  |
Net earnings (loss) |  | 28 |
Total comprehensive loss |  | $ 61 |

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