Revenues from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2019

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)	2019			2018
Residential	$	191.2		$	196.3
Commercial	115.1			117.8
Industrial	43.1			41.7
Oilfield	38.9			33.7
Public authorities and street light	40.1			41.7
System sales revenues	428.4			431.2
Provision for rate refund	(0.1		)	(3.2		)
Integrated market	6.7			8.6
Transmission	36.1			35.8
Other	6.3			5.5
Revenues from contracts with customers	$	477.4		$	477.9