Foreign Exchange (Gain) Loss, Net (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Schedule Of Foreign Exchange Transactions [Line Items] | ||||
| Unrealized Foreign Exchange (Gain) Loss | $ 29 | $ 2 | $ 28 | $ (43) |
| Foreign Exchange (Gain) Loss, Net | 23 | 22 | 21 | 32 |
| Translation of U.S. Dollar Risk Management Contracts Issued From Canada [Member] | ||||
| Schedule Of Foreign Exchange Transactions [Line Items] | ||||
| Unrealized Foreign Exchange (Gain) Loss | (1) | 2 | (2) | (85) |
| Foreign Exchange on Settlements | 0 | 0 | 0 | 98 |
| Translation of Intercompany Notes [Member] | ||||
| Schedule Of Foreign Exchange Transactions [Line Items] | ||||
| Unrealized Foreign Exchange (Gain) Loss | 30 | 0 | 30 | 42 |
| Foreign Exchange on Settlements | 2 | 1 | 1 | (41) |
| Other Monetary Revaluations [Member] | ||||
| Schedule Of Foreign Exchange Transactions [Line Items] | ||||
| Foreign Exchange on Settlements | $ (8) | $ 19 | $ (8) | $ 18 |