Share-Based Compensation (Summarized Non-Employee Director Restricted Stock Units Activity) (Details) (USD $)	11 Months Ended
	Nov. 27, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-Average Grant Date Fair Value, Granted	$ 500,000
Director RSU's [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at beginning of year	16,320
Granted	14,392
Dividends	3,307
Vested, exercised and issued	(34,019)
DP&L [Member] | Director RSU's [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at beginning of year	16,320
Granted	14,392
Dividends	3,307
Vested, exercised and issued	(34,019)
Weighted-Average Grant Date Fair Value, Granted	$ 500,000