Revenue (Tables)

3 Months Ended

Mar. 31, 2019

Disaggregation of Revenue [Table Text Block]

DPL's revenue from contracts with customers was $208.3 million and $198.2 million for the three months ended March 31, 2019 and 2018, respectively. The following table presents our revenue from contracts with customers and other revenue by segment for the three months ended March 31, 2019 and 2018:

$ in millions	Utility		Other		Adjustments and Eliminations			Total
	Three months ended March 31, 2019
Retail Revenue
Retail revenue from contracts with customers	$	182.7	$	—	$	(0.3	)	$	182.4
Other retail revenues (a)	0.7		—		—			0.7
Wholesale Revenue
Wholesale revenue from contracts with customers	5.0		3.4		—			8.4
RTO revenue	10.9		—		—			10.9
RTO capacity revenues	2.1		1.6		—			3.7
Other revenues from contracts with customers (b)	—		2.9		—			2.9
Other revenues	—		0.8		(0.8		)	—
Total revenues	$	201.4	$	8.7	$	(1.1	)	$	209.0
	Three months ended March 31, 2018
Retail Revenue
Retail revenue from contracts with customers	$	161.2	$	—	$	(0.2	)	$	161.0
Other retail revenues (a)	9.2		—		—			9.2
Wholesale Revenue
Wholesale revenue from contracts with customers	12.6		7.7		—			20.3
RTO revenue	11.1		0.1		—			11.2
RTO capacity revenues	1.9		1.4		—			3.3
Other revenues from contracts with customers (b)	—		2.4		—			2.4
Other revenues	—		0.6		(0.6		)	—
Total revenues	$	196.0	$	12.2	$	(0.8	)	$	207.4

(a) Other retail revenue primarily includes alternative revenue programs not accounted for under FASC 606. Accounts receivable balances associated with these revenues were $1.5 million at March 31, 2019, and there were no balances at December 31, 2018.

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

Subsidiaries [Member]

Disaggregation of Revenue [Table Text Block]

DP&L's revenue from contracts with customers was $200.7 million and $186.8 million for the three months ended March 31, 2019 and 2018, respectively. The following table presents our revenue from contracts with customers and other revenue for the three months ended March 31, 2019 and 2018:

	Three months ended
$ in millions	March 31, 2019		March 31, 2018
Retail Revenue
Retail revenue from contracts with customers	$	182.7	$	161.2
Other retail revenues (a)	0.7		9.2
Wholesale Revenue
Wholesale revenue from contracts with customers	5.0		12.6
RTO revenue	10.9		11.1
RTO capacity revenues	2.1		1.9
Total revenues	$	201.4	$	196.0

(a) Other retail revenue primarily includes alternative revenue programs not accounted for under FASC 606. Accounts receivable balances associated with these revenues were $1.5 million at March 31, 2019, and there were no balances at December 31, 2018.