Revenues from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2020

Revenues from Contracts with Customers [Abstract]

Disaggregation of Revenue [Table Text Block]

The following table disaggregates OG&E's revenues from contracts with customers by customer classification. OG&E's operating revenues disaggregated by customer classification can be found in "Results of Operations" within "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations."

	Three Months Ended
	March 31,
(In millions)	2020		2019
Residential	$	166.9	$	191.2
Commercial	91.3		95.4
Industrial	41.5		52.3
Oilfield	38.2		49.4
Public authorities and street light	34.7		40.1
System sales revenues	372.6		428.4
Provision for rate refund	(0.6)		(0.1)
Integrated market	7.2		6.7
Transmission	34.2		36.1
Other	7.0		6.3
Revenues from contracts with customers	$	420.4	$	477.4