Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 41.0	$ 30.5
Restricted cash	0.1	0.1
Accounts receivable, net	92.5	91.9
Inventories	44.5	26.8
Taxes applicable to subsequent years	113.0	94.0
Regulatory Assets, Current	56.6	39.2
Income Taxes Receivable, Current	8.9	10.9
Prepayments and other current assets	6.6	3.9
Total current assets	363.1	297.2
Property, plant and equipment:
Property, plant and equipment (Note 3)	2,521.9	2,193.6
Less: Accumulated depreciation and amortization	(535.1)	(505.7)
Property, plant and equipment, net of depreciation	1,986.8	1,687.9
Construction work in process	234.2	197.1
Total net property, plant and equipment	2,221.0	1,885.0
Other non-current assets:
Regulatory Assets, Noncurrent	155.7	129.8
Intangible assets, net of amortization	114.0	70.1
Other non-current assets	52.4	40.3
Total other non-current assets	322.1	240.2
Total assets	2,906.2	2,422.4
LIABILITIES AND SHAREHOLDER'S EQUITY
Current portion - long-term debt	15.2	155.2
Accounts payable	163.9	129.5
Accrued interest	16.9	16.1
Accrued taxes	101.6	88.4
Customer security deposits	12.7	16.7
Regulatory Liability, Current	18.0	40.4
Other current liabilities	22.6	20.9
Total current liabilities	350.9	467.2
Non-current liabilities:
Long-term debt	1,837.4	1,535.7
Deferred Income Tax Liabilities, Net	227.3	199.0
Taxes payable	113.4	94.5
Regulatory Liability, Noncurrent	182.1	198.7
Pension, retiree and other benefits	37.7	41.8
Other deferred credits	8.5	9.2
Total non-current liabilities	2,406.4	2,078.9
Liabilities	2,757.3	2,546.1
Commitments and contingencies
Common stock, shares outstanding	1	1
Common stock, shares authorized	1,500	1,500
Common shareholder's equity:
Common stock	$ 0.0	$ 0.0
Other paid-in capital	2,840.4	2,601.3
Accumulated other comprehensive income/(loss)	(4.6)	(2.4)
Retained earnings / (deficit)	(2,686.9)	(2,722.6)
Total common shareholder's equity	148.9	(123.7)
Total Liabilities and Shareholder's Equity	2,906.2	2,422.4
THE DAYTON POWER AND LIGHT COMPANY [Member]
Current assets:
Cash and cash equivalents	15.5	19.7
Restricted cash	0.1	0.1
Accounts receivable, net	93.1	92.3
Inventories	44.5	26.8
Taxes applicable to subsequent years	112.9	93.9
Regulatory Assets, Current	56.6	39.2
Income Taxes Receivable, Current	24.4	29.6
Prepayments and other current assets	8.1	4.2
Total current assets	355.1	305.7
Property, plant and equipment:
Property, plant and equipment (Note 3)	3,063.2	2,752.7
Less: Accumulated depreciation and amortization	(1,098.1)	(1,086.5)
Property, plant and equipment, net of depreciation	1,965.1	1,666.2
Construction work in process	230.8	195.3
Total net property, plant and equipment	2,195.9	1,861.5
Other non-current assets:
Regulatory Assets, Noncurrent	155.7	129.8
Intangible assets, net of amortization	111.4	68.5
Other non-current assets	52.9	40.4
Total other non-current assets	320.0	238.7
Total assets	2,871.0	2,405.9
LIABILITIES AND SHAREHOLDER'S EQUITY
Current portion - long-term debt	15.2	120.2
Accounts payable	163.8	129.5
Accrued interest	4.2	3.4
Accrued taxes	101.4	88.3
Customer security deposits	12.7	16.3
Regulatory Liability, Current	18.0	40.4
Other current liabilities	20.2	18.7
Total current liabilities	335.5	416.8
Non-current liabilities:
Long-term debt	1,012.3	712.5
Deferred Income Tax Liabilities, Net	206.1	194.9
Taxes payable	113.4	94.3
Regulatory Liability, Noncurrent	182.1	198.7
Pension, retiree and other benefits	37.7	41.8
Other deferred credits	4.7	5.1
Total non-current liabilities	1,556.3	1,247.3
Liabilities	1,891.8	1,664.1
Commitments and contingencies
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares outstanding	41,172,173	41,172,173
Common stock, shares authorized	50,000,000
Common shareholder's equity:
Common stock	$ 0.4	$ 0.4
Other paid-in capital	977.4	773.6
Accumulated other comprehensive income/(loss)	(27.9)	(26.8)
Retained earnings / (deficit)	29.3	(5.4)
Total common shareholder's equity	979.2	741.8
Total Liabilities and Shareholder's Equity	$ 2,871.0	$ 2,405.9