Revenues from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2018

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" in "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations."

	June 30, 2018
(In millions)	Three Months Ended			Six Months Ended
Residential	$	217.3		$	413.5
Commercial	152.4			270.2
Industrial	47.7			89.4
Oilfield	37.7			71.5
Public authorities and street light	51.1			92.8
System sales revenues	506.2			937.4
Provision for rate refund	(16.5		)	(19.7		)
Integrated market	13.1			21.8
Transmission	40.2			76.0
Other	4.7			10.1
Revenues from contracts with customers	$	547.7		$	1,025.6