Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2020

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)	2020		2019		2020		2019
Residential	$	294.9	$	318.9	$	664.6	$	692.4
Commercial	156.7		172.9		361.0		383.7
Industrial	59.3		66.8		145.5		172.0
Oilfield	50.6		58.6		127.2		156.9
Public authorities and street light	57.8		65.7		133.1		150.2
System sales revenues	619.3		682.9		1,431.4		1,555.2
Provision for rate refund	4.8		(2.3)		3.2		(2.9)
Integrated market	18.0		12.8		33.7		29.8
Transmission	35.0		36.7		109.0		112.6
Other	10.7		9.1		22.9		23.0
Revenues from contracts with customers	$	687.8	$	739.2	$	1,600.2	$	1,717.7