SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - (Schedule Of DWR Loan Activity) (Details) - DWR Loan - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Government Assistance, Liability [Roll Forward] | ||||
| Beginning balance | $ 734 | $ 812 | $ 738 | $ 886 |
| Ending balance | $ 709 | $ 808 | $ 709 | $ 808 |
| Government Assistance, Liability, Statement of Financial Position [Extensible Enumeration] | Long-term debt (includes $11.6 billion and $11.7 billion related to VIEs at respective dates) | Long-term debt (includes $11.6 billion and $11.7 billion related to VIEs at respective dates) | Long-term debt (includes $11.6 billion and $11.7 billion related to VIEs at respective dates) | Long-term debt (includes $11.6 billion and $11.7 billion related to VIEs at respective dates) |
| Performance-Based Disbursements | ||||
| Government Assistance, Liability [Roll Forward] | ||||
| Total deduction | $ 0 | $ (10) | $ 0 | $ (18) |
| Government Assistance, Liability, Decrease, Statement of Financial Position [Extensible Enumeration] | Operating and maintenance | Operating and maintenance | Operating and maintenance | Operating and maintenance |
| Loan Forgiveness and Other Adjustments | ||||
| Government Assistance, Liability [Roll Forward] | ||||
| Total deduction | $ 0 | $ 0 | $ (4) | $ (57) |
| Government Assistance, Liability, Decrease, Statement of Financial Position [Extensible Enumeration] | Operating and maintenance | Operating and maintenance | Operating and maintenance | Operating and maintenance |
| Location, Statement of Financial Position, Activity, Capitalization [Axis]: us-gaap:OtherAssetsNoncurrent | ||||
| Government Assistance, Liability [Roll Forward] | ||||
| Total deduction | $ (25) | $ 0 | $ (25) | $ 0 |
| Location, Statement of Financial Position, Activity, Capitalization [Axis]: us-gaap:OtherLiabilitiesCurrent | ||||
| Government Assistance, Liability [Roll Forward] | ||||
| Change in performance-based disbursements deferred | $ 0 | $ 6 | $ 0 | $ (3) |