Revenue (Tables)

9 Months Ended

Sep. 30, 2018

Disaggregation of Revenue [Table Text Block]

DPL's revenue from contracts with customers was $195.1 million and $560.1 million for the three and nine months ended September 30, 2018, respectively. The following table presents our revenue from contracts with customers and other revenue by segment for the three and nine months ended September 30, 2018:

$ in millions	Utility		Other			Adjustments and Eliminations			Total
	Three Months Ended September 30, 2018
Retail Revenue
Retail revenue from contracts with customers	$	168.4	$	—		$	(0.4	)	$	168.0
Other retail revenues (a)	12.6		—			—			12.6
Wholesale Revenue
Wholesale revenue from contracts with customers	4.9		5.6			—			10.5
RTO revenue	10.8		(0.1		)	—			10.7
RTO capacity revenues	2.0		1.7			—			3.7
Other revenues from contracts with customers (b)	—		2.2			—			2.2
Other revenues	—		0.5			(0.5		)	—
Total revenues	$	198.7	$	9.9		$	(0.9	)	$	207.7
	Nine months ended September 30, 2018
Retail Revenue
Retail revenue from contracts with customers	$	469.3	$	—		$	(0.8	)	$	468.5
Other retail revenues (a)	31.4		—			—			31.4
Wholesale Revenue
Wholesale revenue from contracts with customers	24.6		16.7			—			41.3
RTO revenue	32.4		0.1			—			32.5
RTO capacity revenues	5.8		4.7			—			10.5
Other revenues from contracts with customers (b)	—		7.3			—			7.3
Other revenues	—		1.9			(1.9		)	—
Total revenues	$	563.5	$	30.7		$	(2.7	)	$	591.5

(a) Other retail revenue primarily includes alternative revenue programs not accounted for under FASC 606. Accounts receivable balances associated with these revenues were $6.0 million as of September 30, 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 $186.1 million and $532.1 million for the three and nine months ended September 30, 2018, respectively. The following table presents our revenue from contracts with customers and other revenue for the three and nine months ended September 30, 2018:

	Three		Nine
	months ended		months ended
$ in millions	September 30, 2018		September 30, 2018
Retail Revenue
Retail revenue from contracts with customers	$	168.4	$	469.3
Other retail revenues (a)	12.6		31.4
Wholesale Revenue
Wholesale revenue from contracts with customers	4.9		24.6
RTO revenue	10.8		32.4
RTO capacity revenues	2.0		5.8
Total revenues	$	198.7	$	563.5

(a) Other retail revenue primarily includes alternative revenue programs not accounted for under FASC 606. Accounts receivable balances associated with these revenues were $6.0 million as of September 30, 2018.