SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - DWR Loan (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Government Assistance, Liability [Roll Forward] | |||
| Government Assistance, Liability, Statement of Financial Position [Extensible Enumeration] | Long-term debt (includes $10.1 billion and $10.5 billion related to VIEs at respective dates) | Long-term debt (includes $10.1 billion and $10.5 billion related to VIEs at respective dates) | Long-term debt (includes $10.1 billion and $10.5 billion related to VIEs at respective dates) |
| DWR Loan | |||
| Government Assistance, Liability [Roll Forward] | |||
| Beginning balance | $ 98 | $ 312 | $ 0 |
| Proceeds received | $ 980 | $ 0 | $ 350 |
| Government Assistance, Liability, Increase, Statement of Financial Position [Extensible Enumeration] | Long-term debt (includes $10.1 billion and $10.5 billion related to VIEs at respective dates) | Long-term debt (includes $10.1 billion and $10.5 billion related to VIEs at respective dates) | Long-term debt (includes $10.1 billion and $10.5 billion related to VIEs at respective dates) |
| Ending balance | $ 886 | $ 98 | $ 312 |
| DWR Loan | Performance-Based Disbursements | |||
| Government Assistance, Liability [Roll Forward] | |||
| Total deduction | $ (117) | $ (124) | $ (38) |
| Government Assistance, Liability, Decrease, Statement of Financial Position [Extensible Enumeration] | Operating and maintenance | Operating and maintenance | Operating and maintenance |
| DWR Loan | Loan forgiveness and other adjustments | |||
| Government Assistance, Liability [Roll Forward] | |||
| Total deduction | $ (75) | $ (90) | $ 0 |
| Government Assistance, Liability, Decrease, Statement of Financial Position [Extensible Enumeration] | Operating and maintenance | Operating and maintenance | Operating and maintenance |