Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 20.8	$ 53.2
Restricted Cash	29.0	13.5
Accounts receivable, net (Note 2)	217.3	203.3
Inventories (Note 2)	90.8	82.7
Taxes applicable to subsequent years	56.6	70.6
Regulatory assets, current (Note 3)	32.4	20.8
Other prepayments and current assets	69.1	35.1
Total current assets	516.0	479.2
Property, plant and equipment:
Property, plant and equipment	2,678.6	2,677.0
Less: Accumulated depreciation and amortization	(232.7)	(206.7)
Property, plant and equipment, net of depreciation	2,445.9	2,470.3
Construction work in process	68.5	63.9
Total net property, plant and equipment	2,514.4	2,534.2
Other noncurrent assets:
Regulatory assets, non-current (Note 3)	153.2	159.7
Goodwill	317.0	452.8
Intangible assets, Net of amortization (Note 6)	42.8	42.8
Other deferred assets	47.9	52.8
Total other noncurrent assets	560.9	708.1
Total Assets	3,591.3	3,721.5
Current liabilities:
Current portion - long-term debt (Note 5)	20.2	10.2
Accounts payable	110.0	78.2
Accrued taxes	197.6	89.4
Accrued interest	43.0	28.5
Customer security deposits	14.5	13.9
Insurance and claims costs	6.7	6.7
Other current liabilities	72.2	64.2
Total current liabilities	464.2	291.1
Noncurrent liabilities:
Long-term debt (Note 5)	2,274.2	2,284.2
Deferred taxes (Note 6)	556.1	564.3
Taxes Payable	46.4	79.1
Regulatory liabilities, non-current (Note 3)	123.6	121.1
Pension, retiree and other benefits (Note 9)	51.1	51.6
Unamortized investment tax credit	2.6	2.8
Other deferred credits	71.4	69.4
Total noncurrent liabilities	3,125.4	3,172.5
Redeemable preferred stock of subsidiary	18.4	18.4
Common shareholders' equity:
Other paid-in capital	2,237.3	2,237.0
Accumulated other comprehensive loss	17.1	24.6
Retained earnings/ (deficit)	(2,271.1)	(2,022.1)
Total common shareholders' equity	(16.7)	239.5
Total Liabilities and Shareholders' Equity	3,591.3	3,721.5
THE DAYTON POWER AND LIGHT COMPANY [Member]
Current assets:
Cash and cash equivalents	3.2	22.9
Restricted Cash	29.0	13.0
Accounts receivable, net (Note 2)	162.6	147.5
Inventories (Note 2)	89.6	81.7
Taxes applicable to subsequent years	55.0	68.5
Regulatory assets, current (Note 3)	32.4	20.8
Other prepayments and current assets	66.0	32.5
Total current assets	437.8	386.9
Property, plant and equipment:
Property, plant and equipment	5,124.0	5,105.3
Less: Accumulated depreciation and amortization	(2,482.8)	(2,448.1)
Property, plant and equipment, net of depreciation	2,641.2	2,657.2
Construction work in process	65.3	60.9
Total net property, plant and equipment	2,706.5	2,718.1
Other noncurrent assets:
Regulatory assets, non-current (Note 3)	153.2	159.7
Intangible assets, Net of amortization (Note 6)	9.5	8.3
Other deferred assets	36.1	40.1
Total other noncurrent assets	198.8	208.1
Total Assets	3,343.1	3,313.1
Current liabilities:
Current portion - long-term debt (Note 5)	0.2	0.2
Notes payable - related party (Note 5)	15.0
Accounts payable	102.7	73.9
Accrued taxes	91.1	81.0
Accrued interest	3.9	9.6
Customer security deposits	33.6	33.1
Other current liabilities	68.8	59.7
Total current liabilities	315.3	257.5
Noncurrent liabilities:
Long-term debt (Note 5)	876.9	876.9
Deferred taxes (Note 6)	629.2	632.3
Taxes Payable	45.0	76.5
Regulatory liabilities, non-current (Note 3)	123.6	121.1
Pension, retiree and other benefits (Note 9)	51.1	51.6
Unamortized investment tax credit	24.3	24.9
Other deferred credits	48.5	45.4
Total noncurrent liabilities	1,798.6	1,828.7
Redeemable preferred stock of subsidiary	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	803.3	803.5
Accumulated other comprehensive loss	(33.4)	(26.7)
Retained earnings/ (deficit)	436.0	426.8
Total common shareholders' equity	1,206.3	1,204.0
Total Liabilities and Shareholders' Equity	$ 3,343.1	$ 3,313.1