Revenue from Contracts with Customers (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

The following table presents OG&E's revenues from contracts with customers disaggregated by customer classification. OG&E's operating revenues disaggregated by customer classification can be found in "OG&E (Electric Utility) Results of Operations" within "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations."

	Year Ended December 31,
(In millions)	2021		2020		2019
Residential	$	1,309.1	$	842.7	$	865.8
Commercial	749.2		465.6		486.6
Industrial	323.0		192.6		217.8
Oilfield	312.8		169.2		200.4
Public authorities and street light	284.4		172.3		190.3
System sales revenues	2,978.5		1,842.4		1,960.9
Provision for rate refund	—		3.8		(0.9)
Integrated market	468.9		49.6		38.4
Transmission	140.2		143.3		148.0
Other	1.1		30.7		29.1
Revenues from contracts with customers (A)	$	3,588.7	$	2,069.8	$	2,175.5

(A)In February 2021, Winter Storm Uri resulted in record winter peak demand for electricity and extremely high natural gas and purchased power prices in OG&E's service territory. Operating revenues significantly increased due to increased fuel, purchased power and direct transmission expenses, which are generally recoverable from customers, as a result of Winter Storm Uri. For further discussion, see Note 16 and "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations."