Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

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, 2017 and 2016.

	Three months ended		Nine months ended
	September 30,		September 30,
	2017	2016	2017	2016
DPL	21.8%	45.7%	36.9%	38.6%

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, 2017 and 2016.

	Three months ended		Nine months ended
	September 30,		September 30,
	2017	2016	2017	2016
DP&L	28.9%	39.6%	5.3%	36.7%