Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues	$ 869.0	$ 672.7	$ 660.5
Operating costs and expenses
Net fuel cost	0.1	0.5	1.7
Utilities Operating Expense, Purchased Power	470.2	276.3	230.6
Utilities Operating Expense, Maintenance and Operations	184.7	152.4	181.7
Depreciation and amortization	80.0	76.1	73.3
Taxes, Miscellaneous	85.3	82.1	79.4
Gain (Loss) on Disposition of Business	0.6	0.0	(4.7)
Costs and Expenses	819.7	587.4	571.4
Operating Income (Loss)	49.3	85.3	89.1
Other income / (expense), net
Interest expense	(67.8)	(62.9)	(71.3)
Loss on early extinguishment of debt	(0.1)	0.0	(31.7)
Other income	4.3	0.0	2.0
Other expense, net	(63.6)	(62.9)	(101.0)
Income / (loss) from continuing operations before income tax	(14.3)	22.4	(11.9)
Income tax benefit from continuing operations	(9.6)	(0.5)	(5.5)
Net income / (loss) from continuing operations	(4.7)	22.9	(6.4)
Loss from discontinued operations before income tax	0.0	(1.0)	(0.6)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	0.0	0.0	6.1
Income tax expense / (benefit) from discontinued operations	0.0	(0.2)	0.1
Net income / (loss) from discontinued operations	0.0	(0.8)	5.4
Net loss	(4.7)	22.1	(1.0)
THE DAYTON POWER AND LIGHT COMPANY [Member]
Revenues	860.1	663.7	652.1
Operating costs and expenses
Net fuel cost	0.0	0.5	1.6
Utilities Operating Expense, Purchased Power	469.0	275.1	229.4
Utilities Operating Expense, Maintenance and Operations	185.1	152.1	182.0
Depreciation and amortization	78.7	74.6	71.8
Taxes, Miscellaneous	85.1	81.9	79.1
Gain (Loss) on Disposition of Business	0.6	0.0	(4.7)
Costs and Expenses	817.3	584.2	568.6
Operating Income (Loss)	42.8	79.5	83.5
Other income / (expense), net
Interest expense	(28.8)	(24.2)	(24.3)
Loss on early extinguishment of debt	(0.1)	0.0	0.0
Other income	1.9	(2.5)	(1.1)
Other expense, net	(27.0)	(26.7)	(25.4)
Income / (loss) from continuing operations before income tax	15.8	52.8	58.1
Income tax benefit from continuing operations	(3.1)	5.7	7.0
Net loss	$ 18.9	$ 47.1	$ 51.1