Income Taxes (Tables)

3 Months Ended

Mar. 31, 2012

Schedule of Effective Income Tax Rates (Text Block)

	Three Months Ended
	March 31,
	2012		2011
DPL	26.0	%	36.3	%

Effective Income Tax Rates

	Three Months Ended
	March 31,
	2012		2011
DPL	26.0	%	36.3	%

DP&L [Member]

Schedule of Effective Income Tax Rates (Text Block)

	Three Months Ended
	March 31,
	2012		2011
DP&L	31.3	%	34.0	%

Effective Income Tax Rates

	Three Months Ended
	March 31,
	2012		2011
DP&L	31.3	%	34.0	%