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Foreign Exchange (Gain) Loss, Net (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Schedule Of Foreign Exchange Transactions [Line Items] |  |  |
Unrealized Foreign Exchange (Gain) Loss | $ (43) | $ 35 | $ (6)
Foreign Exchange (Gain) Loss, Net | 31 | (19) | 19
Translation of U.S. Dollar Financing Debt Issued From Canada [Member] |  |  |
Schedule Of Foreign Exchange Transactions [Line Items] |  |  |
Foreign Exchange on Settlements | 0 | (1) | (2)
Translation of U.S. Dollar Risk Management Contracts Issued From Canada [Member] |  |  |
Schedule Of Foreign Exchange Transactions [Line Items] |  |  |
Unrealized Foreign Exchange (Gain) Loss | (85) | 92 | (20)
Foreign Exchange on Settlements | 98 | 3 | 8
Translation of Intercompany Notes [Member] |  |  |
Schedule Of Foreign Exchange Transactions [Line Items] |  |  |
Unrealized Foreign Exchange (Gain) Loss | 42 | (57) | 14
Foreign Exchange on Settlements | (42) | (41) | 8
Other Monetary Revaluations [Member] |  |  |
Schedule Of Foreign Exchange Transactions [Line Items] |  |  |
Foreign Exchange on Settlements | $ 18 | $ (15) | $ 11

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