Report of Business Segments

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Report of Business Segments

Report of Business SegmentsOGE Energy reports its operations in two business segments: (i) the electric utility segment, which is engaged in the generation, transmission, distribution and sale of electric energy and (ii) natural gas midstream operations segment. Prior to the Enable and Energy Transfer merger closing on December 2, 2021, OGE Energy's natural gas midstream operations segment included its equity method investment in Enable. Subsequent to December 2, 2021, OGE Energy's natural gas midstream operations segment includes its investment in Energy Transfer's equity securities and legacy Enable seconded employee pension and postretirement costs. Other operations primarily includes the operations of the holding company. Intersegment revenues are recorded at prices comparable to those of unaffiliated customers and are affected by regulatory considerations. The following tables present the results of OGE Energy's business segments for the three months ended March 31, 2022 and 2021.

Three Months Ended March 31, 2022	Electric Utility		Natural Gas Midstream Operations		Other Operations		Eliminations		Total
(In millions)
Operating revenues	$	589.3	$	—	$	—	$	—	$	589.3
Fuel, purchased power and direct transmission expense	255.7		—		—		—		255.7
Other operation and maintenance	115.5		0.7		(1.2)		—		115.0
Depreciation and amortization	107.4		—		—		—		107.4
Taxes other than income	26.8		—		1.3		—		28.1
Operating income (loss)	83.9		(0.7)		(0.1)		—		83.1
Gain (loss) on equity securities	—		282.3		—		—		282.3
Other income	0.7		8.7		—		(0.1)		9.3
Interest expense	38.2		—		2.0		(0.1)		40.1
Income tax expense (benefit)	7.4		60.2		(12.5)		—		55.1
Net income	$	39.0	$	230.1	$	10.4	$	—	$	279.5
Total assets	$	11,898.8	$	1,068.8	$	320.9	$	(194.9)	$	13,093.6

Three Months Ended March 31, 2021	Electric Utility		Natural Gas Midstream Operations		Other Operations		Eliminations		Total
(In millions)
Operating revenues	$	1,630.6	$	—	$	—	$	—	$	1,630.6
Fuel, purchased power and direct transmission expense	1,346.8		—		—		—		1,346.8
Other operation and maintenance	110.3		0.4		(1.4)		—		109.3
Depreciation and amortization	98.7		—		—		—		98.7
Taxes other than income	25.7		0.1		1.4		—		27.2
Operating income (loss)	49.1		(0.5)		—		—		48.6
Equity in earnings of unconsolidated affiliates	—		53.2		—		—		53.2
Other income (expense)	1.7		(0.5)		(0.1)		(0.2)		0.9
Interest expense	38.4		—		1.2		(0.2)		39.4
Income tax expense (benefit)	1.2		14.3		(4.9)		—		10.6
Net income	$	11.2	$	37.9	$	3.6	$	—	$	52.7
Investment in unconsolidated affiliates	$	—	$	409.2	$	—	$	—	$	409.2
Total assets	$	11,248.2	$	415.4	$	521.6	$	(396.5)	$	11,788.7