NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Summary of Average Annual Depreciation Rates for All Utility Plants) (Details) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||
| Average Annual Depreciation Rates | 3.01% | 3.24% | 3.30% |