Income Taxes (Tables)

9 Months Ended

Sep. 30, 2018

Entity Information [Line Items]

Schedule of Effective Income Tax Rates

The following table details the effective tax rates for the three and nine months ended September 30, 2018 and 2017.

	Three months ended		Nine months ended
	September 30,		September 30,
	2018	2017	2018	2017
DPL	15.7%	63.0%	10.9%	39.1%

THE DAYTON POWER AND LIGHT COMPANY [Member]

Entity Information [Line Items]

Schedule of Effective Income Tax Rates

The following table details the effective tax rates for the three and nine months ended September 30, 2018 and 2017.

	Three months ended		Nine months ended
	September 30,		September 30,
	2018	2017	2018	2017
DP&L	16.8%	(4.5)%	16.2%	18.1%