Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2016

Entity Information [Line Items]

Schedule of Net Periodic Benefit Cost / (Income)

The net periodic benefit cost of the pension and postretirement benefit plans for the three months ended March 31, 2016 and 2015 was:

Net Periodic Benefit Cost	Pension
	Three months ended
	March 31,
$ in millions	2016			2015
Service cost	$	1.4		$	1.8
Interest cost	3.7			4.3
Expected return on plan assets	(5.7		)	(5.7		)
Amortization of unrecognized:
Prior service cost	0.5			0.5
Actuarial loss	1.0			1.5
Net periodic benefit cost	$	0.9		$	2.4

Net Periodic Benefit Cost	Postretirement
	Three months ended
	March 31,
$ in millions	2016			2015
Service cost	$	—		$	—
Interest cost	0.1			0.2
Expected return on plan assets	—			—
Amortization of unrecognized:
Prior service cost	—			—
Actuarial gain	(0.1		)	(0.1		)
Net periodic benefit cost	$	—		$	0.1

Estimated Future Benefit Payments and Medicare Part D Reimbursements

Benefit payments and Medicare Part D reimbursements, which reflect future service, are estimated to be paid as follows:

$ in millions	Pension		Postretirement
2016	$	18.5	$	1.3
2017	25.2		1.6
2018	25.8		1.5
2019	26.3		1.4
2020	26.7		1.4
2021 - 2025	134.8		5.7

THE DAYTON POWER AND LIGHT COMPANY [Member]

Entity Information [Line Items]

Schedule of Net Periodic Benefit Cost / (Income)

The net periodic benefit cost of the pension and postretirement benefit plans for the three months ended March 31, 2016 and 2015 was:

Net Periodic Benefit Cost	Pension
	Three months ended
	March 31,
$ in millions	2016			2015
Service cost	$	1.4		$	1.8
Interest cost	3.7			4.3
Expected return on plan assets	(5.7		)	(5.7		)
Amortization of unrecognized:
Prior service cost	0.8			0.8
Actuarial loss	1.8			2.4
Net periodic benefit cost	$	2.0		$	3.6

Net Periodic Benefit Cost	Postretirement
	Three months ended
	March 31,
$ in millions	2016			2015
Service cost	$	—		$	—
Interest cost	0.1			0.2
Expected return on plan assets	—			—
Amortization of unrecognized:
Prior service cost	—			—
Actuarial gain	(0.1		)	(0.2		)
Net periodic benefit cost	$	—		$	—

Estimated Future Benefit Payments and Medicare Part D Reimbursements

Benefit payments and Medicare Part D reimbursements, which reflect future service, are estimated to be paid as follows:

$ in millions	Pension		Postretirement
2016	$	18.5	$	1.3
2017	25.2		1.6
2018	25.8		1.5
2019	26.3		1.4
2020	26.7		1.4
2021 - 2025	134.8		5.7