Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2025

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

The table below provides information about the Company’s single business segment, including significant segment expenses, and includes reconciliation to Consolidated Net Income (dollars in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
Total revenues	$	807	$	758	$	1,735	$	1,687
Operating expenses:
Purchased power and fuel	294		275		662		680
Operating and maintenance expense:
Generation, transmission and distribution	114		107		224		206
Administrative and other	96		97		192		192
Total operating and maintenance expense	210		204		416		398
Depreciation and amortization	139		122		279		243
Taxes other than income taxes	46		41		92		88
Total operating expenses	689		642		1,449		1,409
Income from operations	118		116		286		278
Interest expense, net:
Interest expense	60		56		120		111
Allowance for borrowed funds used during construction	(3)		(4)		(7)		(8)
Total interest expense, net	57		52		113		103
Other income, net:	13		15		23		26
Income before income taxes	74		79		196		201
Income tax expense	12		7		34		20
Net income	$	62	$	72	$	162	$	181