SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - (Schedule Of DWR Loan Activity) (Details) - DWR Loan - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Government Assistance, Liability [Roll Forward] | ||||
| Beginning balance | $ 709 | $ 808 | $ 738 | $ 886 |
| Ending balance | $ 685 | $ 791 | $ 685 | $ 791 |
| Government Assistance, Liability, Statement of Financial Position [Extensible Enumeration] | Long-term debt (includes $11.5 billion and $11.7 billion related to VIEs at respective dates) | Long-term debt (includes $11.5 billion and $11.7 billion related to VIEs at respective dates) | Long-term debt (includes $11.5 billion and $11.7 billion related to VIEs at respective dates) | Long-term debt (includes $11.5 billion and $11.7 billion related to VIEs at respective dates) |
| Performance-Based Disbursements | ||||
| Government Assistance, Liability [Roll Forward] | ||||
| Total deduction | $ 0 | $ (2) | $ 0 | $ (20) |
| 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 | $ (24) | $ (17) | $ (28) | $ (75) |
| 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 | $ 0 | $ 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 | $ 2 | $ 0 | $ 0 |