Revenue (Tables)

3 Months Ended

Mar. 31, 2022

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, 2022 and 2021:

$ in millions	Utility		Other		Adjustments and Eliminations		Total
	Three months ended March 31, 2022
Retail revenue
Retail revenue from contracts with customers
Residential revenue	$	109.9	$	—	$	—	$	109.9
Commercial revenue	35.0		—		—		35.0
Industrial revenue	16.9		—		—		16.9
Governmental revenue	6.1		—		—		6.1
Other (a)	2.9		—		—		2.9
Total retail revenue from contracts with customers	170.8		—		—		170.8
Wholesale revenue
Wholesale revenue from contracts with customers	7.7		—		(0.2)		7.5
RTO ancillary revenue	15.1		—		—		15.1
Capacity revenue	1.8		—		—		1.8
Miscellaneous revenue
Miscellaneous revenue from contracts with customers (b)	—		2.5		—		2.5
Other miscellaneous revenue	1.6		0.9		(0.9)		1.6
Total revenues	$	197.0	$	3.4	$	(1.1)	$	199.3
	Three months ended March 31, 2021
Retail revenue
Retail revenue from contracts with customers
Residential revenue	$	98.3	$	—	$	—	$	98.3
Commercial revenue	27.3		—		—		27.3
Industrial revenue	12.3		—		—		12.3
Governmental revenue	7.4		—		—		7.4
Other (a)	3.7		—		—		3.7
Total retail revenue from contracts with customers	149.0		—		—		149.0
Wholesale revenue
Wholesale revenue from contracts with customers	5.0		—		(0.2)		4.8
RTO ancillary revenue	14.8		0.1		—		14.9
Capacity revenue	0.9		—		—		0.9
Miscellaneous revenue
Miscellaneous revenue from contracts with customers (b)	—		2.5		—		2.5
Other miscellaneous revenue	3.1		0.9		(0.9)		3.1
Total revenues	$	172.8	$	3.5	$	(1.1)	$	175.2

(a)    "Other" primarily includes Wright-Patterson Air Force Base revenues, billing service fees from CRES providers and other miscellaneous retail revenues from contracts with customers.

(b)    Miscellaneous revenue from contracts with customers primarily includes revenues 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, 2022 and 2021:

	Three months ended
	March 31,
$ in millions	2022		2021
Retail revenue
Retail revenue from contracts with customers
Residential revenue	$	109.9	$	98.3
Commercial revenue	35.0		27.3
Industrial revenue	16.9		12.3
Governmental revenue	6.1		7.4
Other (a)	2.9		3.7
Total retail revenue from contracts with customers	170.8		149.0
Wholesale revenue
Wholesale revenue from contracts with customers	7.7		5.0
RTO ancillary revenue	15.1		14.8
Capacity revenue	1.8		0.9
Miscellaneous revenue	1.6		3.1
Total revenues	$	197.0	$	172.8

(a)    "Other" primarily includes Wright-Patterson Air Force Base revenues, billing service fees from CRES providers and other miscellaneous retail revenues from contracts with customers.