Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 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 June 30,						Six Months Ended June 30,
(In millions)	2019			2018			2019			2018
Residential	$	182.3		$	217.3		$	373.5		$	413.5
Commercial	115.4			135.1			210.8			235.9
Industrial	52.9			57.0			105.2			107.4
Oilfield	48.9			45.7			98.3			87.8
Public authorities and street light	44.4			51.1			84.5			92.8
System sales revenues	443.9			506.2			872.3			937.4
Provision for rate refund	(0.5		)	(16.5		)	(0.6		)	(19.7		)
Integrated market	10.3			13.1			17.0			21.8
Transmission	39.8			40.2			75.9			76.0
Other	7.6			4.7			13.9			10.1
Revenues from contracts with customers	$	501.1		$	547.7		$	978.5		$	1,025.6