Revenue (Tables)

3 Months Ended

Mar. 31, 2025

Disaggregation of Revenue [Table Text Block]

The following table presents our revenue from contracts with customers and other revenue by segment for the three months ended March 31, 2025 and 2024:

$ in millions	Utility		Other		Adjustments and Eliminations		Total
	Three months ended March 31, 2025
Retail revenue
Retail revenue from contracts with customers
Residential revenue	$	136.7	$	—	$	—	$	136.7
Commercial revenue	39.8		—		—		39.8
Industrial revenue	15.7		—		—		15.7
Governmental revenue	7.0		—		—		7.0
Other (a)	2.3		—		—		2.3
Total retail revenue from contracts with customers	201.5		—		—		201.5
Wholesale revenue
Wholesale revenue from contracts with customers	9.2		—		(0.3)		8.9
RTO ancillary revenue	37.6		—		—		37.6
Capacity revenue	0.3		—		—		0.3
Miscellaneous revenue
Miscellaneous revenue from contracts with customers (b)	—		2.5		—		2.5
Other miscellaneous revenue	3.5		1.2		(1.2)		3.5
Total revenue	$	252.1	$	3.7	$	(1.5)	$	254.3
	Three months ended March 31, 2024
Retail revenue
Retail revenue from contracts with customers
Residential revenue	$	124.3	$	—	$	—	$	124.3
Commercial revenue	39.2		—		—		39.2
Industrial revenue	16.7		—		—		16.7
Governmental revenue	5.8		—		—		5.8
Other (a)	3.0		—		—		3.0
Total retail revenue from contracts with customers	189.0		—		—		189.0
Wholesale revenue
Wholesale revenue from contracts with customers	5.0		—		(0.2)		4.8
RTO ancillary revenue	27.8		—		—		27.8
Capacity revenue	0.1		—		—		0.1
Miscellaneous revenue
Miscellaneous revenue from contracts with customers (b)	—		2.3		—		2.3
Other miscellaneous revenue	2.4		1.2		(1.2)		2.4
Total revenue	$	224.3	$	3.5	$	(1.4)	$	226.4

(a)    "Other" primarily includes operation and maintenance service revenue, billing service fees from CRES providers and other miscellaneous retail revenue from contracts with customers.

(b)    Miscellaneous revenue from contracts with customers primarily includes revenue for various services provided by Miami Valley Lighting.

Subsidiaries [Member]

Disaggregation of Revenue [Table Text Block]

The following table presents our revenue from contracts with customers and other revenue for the three months ended March 31, 2025 and 2024:

	Three months ended
	March 31,
$ in millions	2025		2024
Retail revenue
Retail revenue from contracts with customers
Residential revenue	$	136.7	$	124.3
Commercial revenue	39.8		39.2
Industrial revenue	15.7		16.7
Governmental revenue	7.0		5.8
Other (a)	2.3		3.0
Total retail revenue from contracts with customers	201.5		189.0
Wholesale revenue
Wholesale revenue from contracts with customers	9.2		5.0
RTO ancillary revenue	37.6		27.8
Capacity revenue	0.3		0.1
Miscellaneous revenue	3.5		2.4
Total revenue	$	252.1	$	224.3

(a)    "Other" primarily includes operation and maintenance service revenue, billing service fees from CRES providers and other miscellaneous retail revenue from contracts with customers.