Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Fair Value and Cost of Non-Derivative Instruments

	December 31, 2012				December 31, 2011
$ in millions	Cost		Fair Value		Cost		Fair Value
Assets
Money market funds	$	0.2	$	0.2	$	0.2	$	0.2
Equity securities		4.0		5.1		3.9		4.4
Debt securities		4.6		5.0		5.0		5.5
Multi-strategy fund		0.3		0.3		0.3		0.2
Total assets	$	9.1	$	10.6	$	9.4	$	10.3
Liabilities
Debt	$	2,609.9	$	2,707.1	$	2,629.3	$	2,710.6

Fair Value and Redemption Frequency

Fair Value Estimated Using Net Asset Value per Unit
$ in millions	Fair Value at December 31, 2012		Unfunded Commitments		Redemption Frequency
Money market fund (a)	$	0.2	$	-	Immediate
Equity securities (b)		5.1		-	Immediate
Debt Securities (c)		5.0		-	Immediate
Multi-strategy fund (d)		0.3		-	Immediate
Total	$	10.6	$	-

Fair Value Estimated Using Net Asset Value per Unit
$ in millions	Fair Value at December 31, 2011		Unfunded Commitments		Redemption Frequency
Money market fund (a)	$	0.2	$	-	Immediate
Equity securities (b)		4.4		-	Immediate
Debt Securities (c)		5.5		-	Immediate
Multi-strategy fund (d)		0.2		-	Immediate
Total	$	10.3	$	-

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 December 31, 2012(a)		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		5.1		-		5.1		-
Debt securities		5.0		-		5.0		-
Multi-strategy fund		0.3		-		0.3		-
Total Master trust assets		10.6		0.2		10.4		-
Derivative assets
Heating oil futures		0.2		0.2		-		-
Forward power contracts		6.3		-		6.3		-
Total derivative assets		6.5		0.2		6.3		-
Total assets	$	17.1	$	0.4	$	16.7	$	-
Liabilities
Derivative liabilities
FTRs	$	(0.1)	$	-	$	-	$	(0.1)
Interest rate hedges		(29.5)		-		(29.5)		-
Forward power contracts		(13.1)		-		(13.1)		-
Total derivative liabilities		(42.7)		-		(42.6)		(0.1)
Long Term Debt		(2,707.1)		-		(2,688.2)		(18.9)
Total liabilities	$	(2,749.8)	$	-	$	(2,730.8)	$	(19.0)

Assets and Liabilities Measured at Fair Value on a Recurring Basis
			Level 1		Level 2		Level 3
$ in millions	Fair Value at December 31, 2011(a)		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 hedges	$	(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

	December 31, 2012				December 31, 2011
$ in millions	Cost		Fair Value		Cost		Fair Value
Assets
Money market funds	$	0.2	$	0.2	$	0.2	$	0.2
Equity securities		4.0		5.1		3.9		4.4
Debt securities		4.6		5.0		5.0		5.5
Multi-strategy fund		0.3		0.3		0.3		0.2
Total assets	$	9.1	$	10.6	$	9.4	$	10.3
Liabilities
Debt	$	903.1	$	926.9	$	903.4	$	934.5

Fair Value and Redemption Frequency

Fair Value Estimated Using Net Asset Value per Unit
$ in millions	Fair Value at December 31, 2012		Fair Value at December 31, 2011		Unfunded Commitments		Redemption Frequency
Money market fund (a)	$	0.2	$	0.2	$	-	Immediate
Equity securities (b)		5.1		4.4		-	Immediate
Debt Securities (c)		5.0		5.5		-	Immediate
Multi-strategy fund (d)		0.3		0.2		-	Immediate
Total	$	10.6	$	10.3	$	-

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 December 31, 2012(a)		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		5.1		-		5.1		-
Debt securities		5.0		-		5.0		-
Multi-strategy fund		0.3		-		0.3		-
Total Master trust assets		10.6		0.2		10.4		-
Derivative assets
Heating oil futures		0.2		0.2		-		-
Forward power contracts		7.3		-		7.3		-
Total derivative assets		7.5		0.2		7.3		-
Total assets	$	18.1	$	0.4	$	17.7	$	-
Liabilities
Derivative liabilities
FTRs	$	(0.1)	$	-	$	-	$	(0.1)
Forward power contracts		(11.6)		-		(11.6)		-
Total derivative liabilities		(11.7)		-		(11.6)		(0.1)
Long Term debt		(926.9)		-		(908.0)		(18.9)
Total liabilities	$	(938.6)	$	-	$	(919.6)	$	(19.0)

Assets and Liabilities Measured at Fair Value on a Recurring Basis
			Level 1		Level 2		Level 3
$ in millions	Fair Value at December 31, 2011(a)		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		-		4.1		-
Total derivative assets		6.0		1.8		4.2		-
Total assets	$	16.3	$	1.8	$	14.5	$	-
Liabilities
Derivative liabilities
Forward NYMEX coal contracts	$	(14.5)	$	-	$	(14.5)	$	-
Forward power contracts		(5.0)		-		(5.0)		-
Total derivative liabilities		(19.5)		-		(19.5)		-
Total liabilities	$	(19.5)	$	-	$	(19.5)	$	-