REGULATORY ASSETS - Amortization Period of Other Regulatory Expense (Details)	6 Months Ended
	Jun. 30, 2025
Amortization period of other regulatory expense [Abstract]
Deferred contract costs and other	5 years
Amortization period	5 years
Deferred costs affiliated interest agreement	20 years
Goodwill	50 years
Unrecovered reserve for depreciation (general plant assets)	5 years
Minimum [Member]
Amortization period of other regulatory expense [Abstract]
Debt related costs	15 years
Maximum [Member]
Amortization period of other regulatory expense [Abstract]
Debt related costs	30 years
Delaware [Member]
Amortization period of other regulatory expense [Abstract]
Regulatory rate proceedings	3 years
Deferred acquisition costs	20 years
Delaware [Member] | Minimum [Member]
Amortization period of other regulatory expense [Abstract]
Deferred acquisition adjustments	36 years
Delaware [Member] | Maximum [Member]
Amortization period of other regulatory expense [Abstract]
Deferred acquisition adjustments	62 years
Maryland [Member] | Minimum [Member]
Amortization period of other regulatory expense [Abstract]
Deferred acquisition and franchise costs	20 years
Maryland [Member] | Maximum [Member]
Amortization period of other regulatory expense [Abstract]
Deferred acquisition and franchise costs	80 years