Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
REVENUE	$ 876.5	$ 861.0	$ 869.0
OPERATING COSTS AND EXPENSES:
Net purchased power	316.4	346.9	470.2
Operation and maintenance	259.1	232.1	184.7
Depreciation and amortization	95.2	82.1	80.0
Taxes other than income taxes	113.5	100.8	85.3
Other, net	1.2	0.0	(0.5)
Total operating costs and expenses	785.4	761.9	819.7
OPERATING INCOME	91.1	99.1	49.3
OTHER EXPENSE, NET:
Interest expense, net	(85.0)	(63.6)	(67.8)
Other income, net	4.7	6.8	4.2
Total other expense, net	(80.3)	(56.8)	(63.6)
INCOME / (LOSS) BEFORE INCOME TAX	10.8	42.3	(14.3)
Income tax expense / (benefit)	(3.0)	6.6	(9.6)
NET INCOME / (LOSS)	13.8	35.7	(4.7)
THE DAYTON POWER AND LIGHT COMPANY [Member]
REVENUE	867.6	852.0	860.1
OPERATING COSTS AND EXPENSES:
Net purchased power	315.4	346.0	469.0
Operation and maintenance	258.3	229.8	185.1
Depreciation and amortization	93.4	80.7	78.7
Taxes other than income taxes	113.4	100.6	85.1
Other, net	0.9	0.0	(0.6)
Total operating costs and expenses	781.4	757.1	817.3
OPERATING INCOME	86.2	94.9	42.8
OTHER EXPENSE, NET:
Interest expense, net	(48.2)	(25.8)	(28.8)
Other income, net	2.1	5.8	1.8
Total other expense, net	(46.1)	(20.0)	(27.0)
INCOME / (LOSS) BEFORE INCOME TAX	40.1	74.9	15.8
Income tax expense / (benefit)	3.2	13.5	(3.1)
NET INCOME / (LOSS)	$ 36.9	$ 61.4	$ 18.9