Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2019

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue [Table Text Block]

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

	Three Months Ended September 30,					Nine Months Ended September 30,
(In millions)	2019			2018		2019			2018
Residential	$	318.9		$	281.0	$	692.4		$	694.6
Commercial	172.9			150.8		383.7			386.6
Industrial	66.8			67.2		172.0			174.6
Oilfield	58.6			52.4		156.9			140.1
Public authorities and street light	65.7			58.7		150.2			151.5
System sales revenues	682.9			610.1		1,555.2			1,547.4
Provision for rate refund	(2.3		)	13.5		(2.9		)	(6.2		)
Integrated market	12.8			16.9		29.8			38.7
Transmission	36.7			33.2		112.6			109.2
Other	9.1			10.8		23.0			21.0
Revenues from contracts with customers	$	739.2		$	684.5	$	1,717.7		$	1,710.1