Financial Instruments and Risk Management (Narrative) (Details) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
|
Jun. 30, 2026
USD ($)
Contract
|
Jun. 30, 2025
USD ($)
|
Jun. 30, 2026
USD ($)
Contract
|
Jun. 30, 2025
USD ($)
|
Dec. 31, 2025 |
|
| Derivative [Line Items] | |||||
| Realized foreign exchange gain (loss) | $ (68,000,000) | $ 33,000,000 | $ (78,000,000) | $ (35,000,000) | |
| Credit risk, financial instrument, maximum exposure, based on gross fair value basis | 386,000,000 | ||||
| Credit risk, financial instrument, maximum exposure, based on net fair value basis | $ 372,000,000 | $ 372,000,000 | |||
| Number of credit risk derivatives held | Contract | 0 | 0 | |||
| Collateral balances | $ 0 | $ 0 | |||
| Concentration risk, percentage | 95.00% | 95.00% | 94.00% | ||
| Foreign Exchange Contract [Member] | |||||
| Derivative [Line Items] | |||||
| Realized foreign exchange gain (loss) | $ 0 | $ 0 | $ 0 | (98,000,000) | |
| Montney Acquisition [Member] | Foreign Exchange Contract [Member] | |||||
| Derivative [Line Items] | |||||
| Realized foreign exchange gain (loss) | $ (97,000,000) | ||||