Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues	$ 1,612.8	$ 1,716.5	$ 1,579.0
Cost of revenues:
Fuel	259.8	304.5	366.7
Purchased power	562.6	587.9	383.0
Total cost of revenues	822.4	892.4	749.7
Gross margin	790.4	824.1	829.3
Operating expenses:
Operation and maintenance	361.3	362.4	365.7
Depreciation and amortization	134.6	135.6	129.2
General taxes	87.0	87.8	76.8
Goodwill impairment	317.0	0.0	306.3
Fixed-asset impairment	0.0	11.5	26.2
Other	0.4	(3.9)	2.5
Total operating expenses	900.3	593.4	906.7
Operating income / (loss)	(109.9)	230.7	(77.4)
Other income / (expense), net
Investment income	0.2	0.9	1.4
Interest expense	(118.3)	(126.6)	(124.0)
Charge for early redemption of debt	(2.1)	(30.9)	(2.8)
Other deductions	(1.3)	(1.5)	(3.0)
Other expense, net	(121.5)	(158.1)	(128.4)
Earnings (loss) from continuing operations before income tax	(231.4)	72.6	(205.8)
Income tax expense from continuing operations	20.0	15.4	19.8
Net income / (loss) from continuing operations	(251.4)	57.2	(225.6)
Income / (loss) from discontinued operations	11.4	(129.2)	6.0
Income tax expense / (benefit)	(1.0)	2.6	2.4
Discontinued operations	12.4	(131.8)	3.6
Net loss	(239.0)	(74.6)	(222.0)
THE DAYTON POWER AND LIGHT COMPANY [Member]
Revenues	1,552.3	1,668.3	1,551.5
Cost of revenues:
Fuel	244.7	314.9	362.5
Purchased power	555.7	582.4	381.9
Total cost of revenues	800.4	897.3	744.4
Gross margin	751.9	771.0	807.1
Operating expenses:
Operation and maintenance	350.5	355.2	364.2
Depreciation and amortization	138.2	144.8	140.2
General taxes	85.0	85.7	74.3
Fixed-asset impairment	0.0	0.0	86.0
Other	0.4	(3.5)	2.5
Total operating expenses	574.1	582.2	667.2
Operating income / (loss)	177.8	188.8	139.9
Other income / (expense), net
Investment income	0.3	0.9	2.0
Interest expense	(30.9)	(33.9)	(37.2)
Charge for early redemption of debt	(5.0)	0.0	0.0
Other deductions	(0.7)	(1.1)	(2.5)
Other expense, net	(36.3)	(34.1)	(37.7)
Earnings (loss) from continuing operations before income tax	141.5	154.7	102.2
Income tax expense from continuing operations	35.1	39.7	18.6
Dividends on preferred stock	0.9	0.9	0.9
Earnings attributable to common stock	105.5	114.1	82.7
Net loss	$ 106.4	$ 115.0	$ 83.6