Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues	$ 389.3	$ 403.3	$ 1,081.6	$ 1,252.1
Cost of revenues:
Fuel	78.9	71.4	206.0	202.2
Purchased power	111.7	144.9	330.5	458.5
Total cost of revenues	190.6	216.3	536.5	660.7
Gross margin	198.7	187.0	545.1	591.4
Operating expenses:
Operation and maintenance	91.5	95.8	257.2	267.4
Depreciation and amortization	30.9	33.8	100.3	100.9
General taxes	21.6	21.7	64.2	66.7
Impairment of Long-Lived Assets Held-for-use	0.0	0.0	235.5	0.0
Other	(0.7)	0.2	(0.6)	0.4
Total operating expenses	143.3	151.5	656.6	435.4
Operating income / (loss)	55.4	35.5	(111.5)	156.0
Other income / (expense), net
Investment income	0.1	0.1	0.3	0.1
Interest expense	(27.0)	(28.9)	(79.3)	(90.3)
Charge for early retirement of debt	(0.5)	(2.1)	(3.1)	(2.1)
Other expense	(0.2)	(0.5)	(0.9)	(1.2)
Total other expense, net	(27.6)	(31.4)	(83.0)	(93.5)
Earnings / (loss) from continuing operations before income taxes	27.8	4.1	(194.5)	62.5
Income tax expense / (benefit) from continuing operations	12.7	(1.4)	(75.0)	15.4
Net income / (loss) from continuing operations	15.1	5.5	(119.5)	47.1
Income / (loss) from discontinued operations	0.0	4.9	(0.7)	10.1
Gain from disposal of discontinued operations	0.0	0.0	49.2	0.0
Income tax expense / (benefit) for discontinued operations	0.0	1.8	18.9	(1.8)
Discontinued operations	0.0	3.1	29.6	11.9
Net income / (loss)	15.1	8.6	(89.9)	59.0
THE DAYTON POWER AND LIGHT COMPANY [Member]
Revenues	368.4	389.2	1,031.3	1,202.6
Cost of revenues:
Fuel	71.0	69.0	189.5	188.9
Purchased power	110.0	142.5	328.0	452.3
Total cost of revenues	181.0	211.5	517.5	641.2
Gross margin	187.4	177.7	513.8	561.4
Operating expenses:
Operation and maintenance	85.5	93.5	248.0	261.6
Depreciation and amortization	24.1	34.6	95.2	103.5
General taxes	21.2	21.1	62.8	65.0
Impairment of Long-Lived Assets Held-for-use	0.0	0.0	857.1	0.0
Gain on termination of contract	0.0	0.0	(27.7)	0.0
Other	0.0	0.0	0.2	0.4
Total operating expenses	130.8	149.2	1,235.6	430.5
Operating income / (loss)	56.6	28.5	(721.8)	130.9
Other income / (expense), net
Investment income	0.1	0.0	0.3	0.2
Interest expense	(6.5)	(6.9)	(17.2)	(24.6)
Charge for early retirement of debt	(0.5)	(5.0)	(0.5)	(5.0)
Other expense	0.1	(0.3)	(0.2)	(0.6)
Total other expense, net	(6.8)	(12.2)	(17.6)	(30.0)
Earnings / (loss) from continuing operations before income taxes	49.8	16.3	(739.4)	100.9
Income tax expense / (benefit) from continuing operations	19.7	0.8	(271.6)	25.0
Net income / (loss)	30.1	15.5	(467.8)	75.9
Dividends on preferred stock	0.3	0.3	0.7	0.7
Income / (loss) attributable to common stock	$ 29.8	$ 15.2	$ (468.5)	$ 75.2