Fair Value (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value and Cost Of Non-Derivative Instruments

The following table presents the fair value and cost of our non-derivative instruments at March 31, 2016 and December 31, 2015. Information about the fair value of our derivative instruments can be found in Note 4 – Derivative Instruments and Hedging Activities.

	March 31, 2016				December 31, 2015
$ in millions	Cost		Fair Value		Cost		Fair Value
Assets
Money market funds	$	0.1	$	0.1	$	0.2	$	0.2
Equity securities	2.9		3.8		3.0		3.8
Debt securities	4.0		3.9		4.4		4.3
Hedge funds	0.3		0.3		0.4		0.4
Real estate	0.3		0.4		0.3		0.3
Total Assets	$	7.6	$	8.5	$	8.3	$	9.0
Liabilities
Debt	$	1,921.9	$	1,977.2	$	1,993.3	$	1,975.3

Fair Value of Assets and Liabilities Measured on Recurring Basis

The fair value of assets and liabilities at March 31, 2016 and December 31, 2015 and the respective category within the fair value hierarchy for DPL was determined as follows:

Assets and Liabilities at Fair Value
			Level 1		Level 2			Level 3
$ in millions	Fair value at March 31, 2016		Based on Quoted Prices in Active Markets		Other Observable Inputs			Unobservable Inputs
Assets
Master Trust assets
Money market funds	$	0.1	$	0.1	$	—		$	—
Equity securities	3.8		—		3.8			—
Debt securities	3.9		—		3.9			—
Hedge funds	0.3		—		0.3			—
Real estate	0.4		—		0.4			—
Total Master Trust assets	8.5		0.1		8.4			—
Derivative Assets
FTRs	0.1		—		—			0.1
Forward power contracts	60.7		—		62.5			(1.8		)
Total Derivative assets	60.8		—		62.5			(1.7		)
Total Assets	$	69.3	$	0.1	$	70.9		$	(1.7	)
Liabilities
Derivative Liabilities
FTRs	0.2		—		—			0.2
Natural gas futures	0.2		0.2		—			—
Forward power contracts	43.5		—		41.1			2.4
Total Derivative liabilities	43.9		0.2		41.1			2.6
Debt	1,977.2		—		(1,959.1		)	3,936.3
Total Liabilities	$	2,021.1	$	0.2	$	(1,918.0	)	$	3,938.9

Assets and Liabilities at Fair Value
			Level 1		Level 2		Level 3
$ in millions	Fair value at December 31, 2015		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	3.8		—		3.8		—
Debt securities	4.3		—		4.3		—
Hedge funds	0.4		—		0.4		—
Real estate	0.3		—		0.3		—
Total Master Trust assets	9.0		0.2		8.8		—
Derivative assets
Forward power contracts	30.5		—		30.5		—
FTRs	0.2		—		—		0.2
Total Derivative assets	30.7		—		30.5		0.2
Total Assets	$	39.7	$	0.2	$	39.3	$	0.2
Liabilities
Derivative liabilities
FTRs	$	0.5	$	—	$	—	0.5
Forward power contracts	27.0		—		23.9		3.1
Total Derivative liabilities	27.5		—		23.9		3.6
Debt	1,975.3		—		1,957.2		18.1
Total Liabilities	$	2,002.8	$	—	$	1,981.1	$	21.7

THE DAYTON POWER AND LIGHT COMPANY [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value and Cost Of Non-Derivative Instruments

The following table presents the fair value and cost of our non-derivative instruments at March 31, 2016 and December 31, 2015. Information about the fair value of our derivative instruments can be found in Note 4 – Derivative Instruments and Hedging Activities.

	March 31, 2016				December 31, 2015
$ in millions	Cost		Fair Value		Cost		Fair Value
Assets
Money market funds	$	0.1	$	0.1	$	0.2	$	0.2
Equity securities	2.9		3.8		3.0		3.8
Debt securities	4.0		3.9		4.4		4.3
Hedge funds	0.3		0.3		0.4		0.4
Real estate	0.3		0.4		0.3		0.3
Total assets	$	7.6	$	8.5	$	8.3	$	9.0
Liabilities
Debt	$	757.5	$	765.4	$	756.7	$	764.2

Fair Value of Assets and Liabilities Measured on Recurring Basis

The fair value of assets and liabilities at March 31, 2016 and December 31, 2015 and the respective category within the fair value hierarchy for DP&L was determined as follows:

Assets and Liabilities at Fair Value
			Level 1		Level 2		Level 3
$ in millions	Fair value at March 31, 2016		Based on Quoted Prices in Active Markets		Other Observable Inputs		Unobservable Inputs
Assets
Master Trust assets
Money market funds	$	0.1	$	0.1	$	—	$	—
Equity securities	3.8		—		3.8		—
Debt securities	3.9		—		3.9		—
Hedge funds	0.3		—		0.3		—
Real estate	0.4		—		0.4		—
Total Master Trust assets	8.5		0.1		8.4		—
Derivative assets
FTRs	0.1		—		—		0.1
Forward power contracts	61.0		—		62.7		(1.7		)
Total derivative assets	61.1		—		62.7		(1.6		)
Total assets	$	69.6	$	0.1	$	71.1	$	(1.6	)
Liabilities
Derivative liabilities
FTRs	$	0.2	$	—	$	—	$	0.2
Natural gas futures	0.2		0.2		—		—
Forward power contracts	43.5		—		41.1		2.4
Total derivative liabilities	43.9		0.2		41.1		2.6
Debt	765.4		—		747.3		18.1
Total liabilities	$	809.3	$	0.2	$	788.4	$	20.7

Assets and Liabilities at Fair Value
			Level 1		Level 2		Level 3
$ in millions	Fair value at December 31, 2015		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	3.8		—		3.8		—
Debt securities	4.3		—		4.3		—
Hedge funds	0.4		—		0.4		—
Real estate	0.3		—		0.3		—
Total Master Trust assets	9.0		0.2		8.8		—
Derivative assets
FTRs	0.2		—		—		0.2
Forward power contracts	30.6		—		30.6		—
Total Derivative assets	30.8		—		30.6		0.2
Total assets	$	39.8	$	0.2	$	39.4	$	0.2
Liabilities
Derivative liabilities
FTRs	$	0.5	$	—	$	—	$	0.5
Forward power contracts	27.0		—		23.9		3.1
Total Derivative liabilities	27.5		—		23.9		3.6
Debt	764.2		—		746.1		18.1
Total liabilities	$	791.7	$	—	$	770.0	$	21.7