SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Allowance for Doubtful Accounts and Credit Losses (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Public Utility, Property, Plant and Equipment [Line Items] | |||
| Credit losses | $ 341 | $ 636 | $ 143 |
| Regulatory assets | 15,561 | 17,189 | |
| Regulatory Balancing Accounts Receivable | |||
| Public Utility, Property, Plant and Equipment [Line Items] | |||
| Total regulatory balancing accounts | 7,227 | 5,660 | |
| FERC TO rates | |||
| Public Utility, Property, Plant and Equipment [Line Items] | |||
| Regulatory assets | 85 | 78 | |
| Residential uncollectibles balancing accounts | Regulatory Balancing Accounts Receivable | |||
| Public Utility, Property, Plant and Equipment [Line Items] | |||
| Total regulatory balancing accounts | $ 260 | $ 507 | |