Fair Value Measurements (Tables)

3 Months Ended

9 Months Ended

12 Months Ended

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2011

Fair Value and Cost of Non-Derivative Instruments

	Successor
	At September 30,				At December 31,
	2012				2011
$ in millions	Cost		Fair Value		Cost		Fair Value
Assets
Money Market Funds	$	0.2	$	0.2	$	0.2	$	0.2
Equity Securities		3.9		5.2		3.9		4.4
Debt Securities		5.0		5.5		5.0		5.5
Multi-Strategy Fund		0.3		0.3		0.3		0.2
Total Assets	$	9.4	$	11.2	$	9.4	$	10.3
Liabilities
Debt	$	2,614.9	$	2,769.4	$	2,629.3	$	2,710.6

Fair Value and Redemption Frequency

Fair Value Estimated Using Net Asset Value per Unit (Successor)
$ in millions	Fair Value at September 30, 2012		Fair Value at December 31, 2011		Unfunded Commitments
Equity Securities (a)	$	5.2	$	4.4	$	-
Debt Securities (b)		5.5		5.5		-
Multi-Strategy Fund (c)		0.3		0.2		-
Total	$	11.0	$	10.1	$	-

Fair Value of Assets and Liabilities Measured on Recurring Basis

Assets and Liabilities Measured at Fair Value on a Recurring Basis (Successor)
			Level 1		Level 2		Level 3
$ in millions	Fair Value at September 30, 2012		Based on Quoted Prices in Active Markets		Other Observable Inputs		Unobservable Inputs
Assets
Master Trust Assets
Money Market Funds	$	0.2	$	0.2	$	-	$	-
Equity Securities		5.2		-		5.2		-
Debt Securities		5.5		-		5.5		-
Multi-Strategy Fund		0.3		-		0.3		-
Total Master Trust Assets		11.2		0.2		11.0		-
Derivative Assets
FTRs		0.1		-		-		0.1
Heating Oil Futures		0.4		0.4		-		-
Forward Power Contracts		16.8		-		16.8		-
Total Derivative Assets		17.3		0.4		16.8		0.1
Total Assets	$	28.5	$	0.6	$	27.8	$	0.1
Liabilities
Derivative Liabilities
Interest Rate Hedge	$	(35.7)	$	-	$	(35.7)	$	-
FTRs		(0.1)		-		-		(0.1)
Forward NYMEX Coal Contracts		(1.1)		-		(1.1)		-
Forward Power Contracts		(21.0)		-		(21.0)		-
Total Derivative Liabilities		(57.9)		-		(57.8)		(0.1)
Long-term Debt		(2,769.4)		-		(2,750.4)		(19.0)
Total Liabilities	$	(2,827.3)	$	-	$	(2,808.2)	$	(19.1)

Assets and Liabilities Measured at Fair Value on a Recurring Basis (Successor)
			Level 1		Level 2		Level 3
$ in millions	Fair Value as of December 31, 2011		Based on Quoted Prices in Active Markets		Other Observable Inputs		Unobservable Inputs
Assets
Master Trust Assets
Money Market Funds	$	0.2	$	-	$	0.2	$	-
Equity Securities		4.4		-		4.4		-
Debt Securities		5.5		-		5.5		-
Multi-Strategy Fund		0.2		-		0.2		-
Total Master Trust Assets		10.3		-		10.3		-
Derivative Assets
FTRs		0.1		-		0.1		-
Heating Oil Futures		1.8		1.8		-		-
Forward Power Contracts		17.3		-		17.3		-
Total Derivative Assets		19.2		1.8		17.4		-
Total Assets	$	29.5	$	1.8	$	27.7	$	-
Liabilities
Derivative Liabilities
Interest Rate Hedge	$	(32.5)	$	-	$	(32.5)	$	-
Forward NYMEX Coal Contracts		(14.5)		-		(14.5)		-
Forward Power Contracts		(13.3)		-		(13.3)		-
Total Derivative Liabilities		(60.3)		-		(60.3)		-
Total Liabilities	$	(60.3)	$	-	$	(60.3)	$	-

DP&L [Member]

Fair Value and Cost of Non-Derivative Instruments

	At September 30,				At December 31,
	2012				2011
$ in millions	Cost		Fair Value		Cost		Fair Value
Assets
Money Market Funds	$	0.2	$	0.2	$	0.2	$	0.2
Equity Securities		3.9		5.2		3.9		4.4
Debt Securities		5.0		5.5		5.0		5.5
Multi-Strategy Fund		0.3		0.3		0.3		0.2
Total Assets	$	9.4	$	11.2	$	9.4	$	10.3
Liabilities
Debt	$	903.2	$	934.5	$	903.4	$	934.5

Fair Value and Redemption Frequency

Fair Value Estimated Using Net Asset Value per Unit
$ in millions	Fair Value at September 30, 2012		Fair Value at December 31, 2011		Unfunded Commitments
Equity Securities (a)	$	5.2	$	4.4	$	-
Debt Securities (b)		5.5		5.5		-
Multi-Strategy Fund (c)		0.3		0.2		-
Total	$	11.0	$	10.1	$	-

Fair Value of Assets and Liabilities Measured on Recurring Basis

Assets and Liabilities Measured at Fair Value on a Recurring Basis
			Level 1		Level 2		Level 3
$ in millions	Fair Value at September 30, 2012		Based on Quoted Prices in Active Markets		Other Observable Inputs		Unobservable Inputs
Assets
Master Trust Assets
Money Market Funds	$	0.2	$	0.2	$	-	$	-
Equity Securities		5.2		-		5.2		-
Debt Securities		5.5		-		5.5		-
Multi-Strategy Fund		0.3		-		0.3		-
Total Master Trust Assets		11.2		0.2		11.0		-
Derivative Assets
FTRs		0.1		-		-		0.1
Heating Oil Futures		0.4		0.4		-		-
Forward Power Contracts		5.0		-		5.0		-
Total Derivative Assets		5.5		0.4		5.0		0.1
Total Assets	$	16.7	$	0.6	$	16.0	$	0.1
Liabilities
Derivative Liabilities
FTRs	$	(0.1)	$	-	$	-	$	(0.1)
Forward NYMEX Coal Contracts		(1.1)		-		(1.1)		-
Forward Power Contracts		(18.6)		-		(18.6)		-
Total Derivative Liabilities		(19.8)		-		(19.7)		(0.1)
Long-term Debt		(934.5)		-		(915.5)		(19.0)
Total Liabilities	$	(954.3)	$	-	$	(935.2)	$	(19.1)

Assets and Liabilities Measured at Fair Value on a Recurring Basis
			Level 1		Level 2		Level 3
$ in millions	Fair Value as of December 31, 2011		Based on Quoted Prices in Active Markets		Other Observable Inputs		Unobservable Inputs
Assets
Master Trust Assets
Money Market Funds	$	0.2	$	-	$	0.2	$	-
Equity Securities		4.4		-		4.4		-
Debt Securities		5.5		-		5.5		-
Multi-Strategy Fund		0.2		-		0.2		-
Total Master Trust Assets		10.3		-		10.3		-
Derivative Assets
FTRs		0.1		-		0.1		-
Heating Oil Futures		1.8		1.8		-		-
Forward Power Contracts		4.1		-		17.3		-
Total Derivative Assets		6.0		1.8		17.4		-
Total Assets	$	16.3	$	1.8	$	27.7	$	-
Liabilities
Derivative Liabilities
Forward NYMEX Coal Contracts	$	(14.5)	$	-	$	(14.5)	$	-
Forward Power Contracts		(5.0)		-		(13.3)		-
Total Derivative Liabilities		(19.5)		-		(27.8)		-
Total Liabilities	$	(19.5)	$	-	$	(27.8)	$	-