Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2020

Entity Information [Line Items]

Schedule of Related Party Transactions [Table Text Block]

The following table provides a summary of our related party transactions:

	Years ended December 31,
$ in millions	2020		2019		2018
Transactions with the Service Company
Charges for services provided	$	38.8	$	33.8	$	41.0
Charges to the Service Company	$	4.2	$	3.6	$	4.9
Transactions with other AES affiliates:
Payments for health, welfare and benefit plans	$	10.7	$	11.2	$	7.9
Consulting and other services	$	0.8	$	0.7	$	2.0
Balances with related parties:	At December 31, 2020		At December 31, 2019
Net payable to the Service Company	$	(14.8)	$	(11.0)
Net receivable from / (payable to) AES and other AES affiliates (a)	$	(1.7)	$	2.0

(a)The December 31, 2019 net receivable amount includes a $5.1 million receivable balance with AES related to the sale of software previously recorded on AES Ohio Generation during the year ended December 31. 2019. There was no gain or loss recorded on the transaction. These $5.1 million of proceeds on the sale were received in 2020.

THE DAYTON POWER AND LIGHT COMPANY [Member]

Entity Information [Line Items]

Schedule of Related Party Transactions [Table Text Block]

The following table provides a summary of our related party transactions:

	Years ended December 31,
$ in millions	2020		2019		2018
DP&L Operation & Maintenance Expenses:
Premiums charged for insurance services provided by MVIC (a)	$	3.4	$	3.1	$	2.7
Transactions with the Service Company:
Charges for services provided	$	37.5	$	31.2	$	25.7
Charges to the Service Company	$	4.1	$	3.5	$	4.9
Transactions with other AES affiliates:
Charges for health, welfare and benefit plans	$	10.1	$	10.4	$	8.7
Charges to affiliates for non-power goods or services (b)	$	4.1	$	4.1	$	7.1
Consulting and other services	$	0.8	$	0.7	$	2.0
Balances with related parties:	At December 31, 2020		At December 31, 2019
Net payable to the Service Company	$	(14.8)	$	(11.0)
Net payable to AES and other AES affiliates	$	(2.1)	$	(3.5)

(a)    MVIC, a wholly-owned captive insurance subsidiary of DPL, provides insurance coverage to DP&L and other DPL subsidiaries for workers’ compensation, general liability, property damages and directors’ and officers’ liability. These amounts represent insurance premiums charged by MVIC to DP&L.

(b)    In the normal course of business DP&L incurred and recorded expenses on behalf of DPL affiliates. Such expenses included but were not limited to employee-related expenses, accounting, information technology, payroll, legal and other administration expenses. DP&L subsequently charged these expenses to the affiliates at DP&L’s cost and credited the expense in which they were initially recorded.