Share-Based Compensation (Information About 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 of share based compensation award granted during the period	$ 500,000
Intrinsic value of share based compensation award exercised during the period	1,000,000
Fair value of shares that vested during the period	1,000,000
Weighted average period to recognize compensation expense (in years)	0 years
DP&L [Member] | Director RSU's [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value of share based compensation award granted during the period	500,000
Intrinsic value of share based compensation award exercised during the period	1,000,000
Fair value of shares that vested during the period	$ 1,000,000
Weighted average period to recognize compensation expense (in years)	0 months