Income Taxes (Tables)

9 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Effective Income Tax Rates

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
DPL	29.9	%	31.9	%	32.9	%	32.8	%
DP&L	29.6	%	32.1	%	32.0	%	32.8	%