Income Taxes (Tables)

6 Months Ended

Jun. 30, 2018

Entity Information [Line Items]

Schedule of Effective Income Tax Rates

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

	Three months ended		Six months ended
	June 30,		June 30,
	2018	2017	2018	2017
DPL	21.7%	29.7%	26.2%	32.7%

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 six months ended June 30, 2018 and 2017.

	Three months ended		Six months ended
	June 30,		June 30,
	2018	2017	2018	2017
DP&L	12.3%	25.2%	15.7%	29.4%