Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 THE DAYTON POWER AND LIGHT COMPANY [Member]	Dec. 31, 2012 THE DAYTON POWER AND LIGHT COMPANY [Member]
Current assets:
Cash and cash equivalents	$ 53.2	$ 192.1	$ 22.9	$ 28.5
Restricted Cash	13.5	10.7	13.0	10.7
Accounts receivable, net (Note 3)	203.3	208.2	147.5	160.0
Inventories (Note 3)	82.7	110.1	81.7	108.9
Taxes applicable to subsequent years	70.6	69.3	68.5	66.7
Regulatory assets, current (Note 4)	20.8	21.1	20.8	18.3
Other prepayments and current assets	35.1	43.1	32.5	33.0
Total current assets	479.2	654.6	386.9	426.1
Property, plant and equipment:
Property, plant and equipment	2,677.0	2,590.4	5,105.3	5,249.0
Less: Accumulated depreciation and amortization	(206.7)	(115.9)	(2,448.1)	(2,516.3)
Property, plant and equipment, net of depreciation	2,470.3	2,474.5	2,657.2	2,732.7
Construction work in process	63.9	89.3	60.9	87.8
Total net property, plant and equipment	2,534.2	2,563.8	2,718.1	2,820.5
Other noncurrent assets:
Regulatory assets, non-current (Note 4)	159.7	185.5	159.7	185.5
Goodwill	452.8	759.1
Intangible assets, Net of amortization (Note 6)	42.8	50.1	8.3	9.0
Other deferred assets	52.8	34.2	40.1	23.1
Total other noncurrent assets	708.1	1,028.9	208.1	217.6
Total Assets	3,721.5	4,247.3	3,313.1	3,464.2
Current liabilities:
Current portion - long-term debt (Note 7)	10.2	584.9	0.2	570.4
Accounts payable	78.2	83.2	73.9	79.1
Accrued taxes	89.4	97.1	81.0	92.2
Accrued interest	28.5	31.8	9.6	13.1
Customer security deposits	13.9	15.0	33.1	35.2
Regulatory liabilities, current (Note 4)		0.1		0.1
Insurance and claims costs	6.7	11.5
Other current liabilities	64.2	96.9	59.7	52.1
Total current liabilities	291.1	920.5	257.5	842.2
Noncurrent liabilities:
Long-term debt (Note 7)	2,284.2	2,025.0	876.9	332.7
Deferred taxes (Note 8)	564.3	534.9	632.3	652.0
Taxes Payable	79.1	68.1	76.5	66.0
Regulatory liabilities, non-current (Note 4)	121.1	117.3	121.1	117.3
Pension, retiree and other benefits (Note 9)	51.6	61.6	51.6	61.6
Unamortized investment tax credit	2.8	3.3	24.9	27.4
Other deferred credits	69.4	71.4	45.4	43.0
Total noncurrent liabilities	3,172.5	2,881.6	1,828.7	1,300.0
Redeemable preferred stock of subsidiary	18.4	18.4	22.9	22.9
Common shareholders' equity:
Common stock, at par value of $0.01 per share:			0.4	0.4
Other paid-in capital	2,237.0	2,236.7	803.5	803.3
Accumulated other comprehensive loss	24.6	(3.9)	(26.7)	(38.7)
Retained earnings/ (deficit)	(2,022.1)	(1,806.0)	426.8	534.1
Total common shareholders' equity	239.5	426.8	1,204.0	1,299.1
Total Liabilities and Shareholders' Equity	$ 3,721.5	$ 4,247.3	$ 3,313.1	$ 3,464.2