CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
CURRENT ASSETS
Cash and cash equivalents	$ 0.2	$ 0.2
Accounts receivable	304.8	347.8
Accrued unbilled revenues	67.9	76.2
Income taxes receivable	35.7	37.3
Fuel inventories	108.8	112.0
Materials and supplies, at average cost	212.9	212.7
Other	78.2	71.7
Total current assets	808.5	857.9
OTHER PROPERTY AND INVESTMENTS
Other	128.8	129.4
Total other property and investments	128.8	129.4
PROPERTY, PLANT AND EQUIPMENT
In service	17,409.6	17,203.0
Construction work in progress	744.3	744.9
Total property, plant and equipment	18,153.9	17,947.9
Less: accumulated depreciation	5,243.1	5,217.5
Net property, plant and equipment	12,910.8	12,730.4
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	555.9	557.2
Other	68.1	95.6
Total deferred charges and other assets	624.0	652.8
TOTAL ASSETS	14,472.1	14,370.5
CURRENT LIABILITIES
Short-term debt	492.4	292.0
Accounts payable	282.9	350.6
Dividends payable	87.7	87.6
Customer deposits	125.3	127.2
Accrued taxes	32.8	53.0
Accrued interest	82.6	68.8
Accrued compensation	33.4	54.3
Fuel clause over recoveries	55.3	27.1
Other	39.5	33.5
Total current liabilities	1,231.9	1,094.1
LONG-TERM DEBT	5,369.6	5,369.2
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	153.1	164.4
Deferred income taxes	1,511.2	1,489.3
Deferred investment tax credits	9.6	9.8
Regulatory liabilities	941.9	957.1
Other	315.6	309.3
Total deferred credits and other liabilities	2,931.4	2,929.9
Total liabilities	9,532.9	9,393.2
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,379.3	1,378.4
Retained earnings	3,562.5	3,601.5
Accumulated other comprehensive loss, net of tax	(2.6)	(2.6)
Total stockholders' equity	4,939.2	4,977.3
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	14,472.1	14,370.5
OG&E [Member]
CURRENT ASSETS
Cash and cash equivalents	0.2	0.2
Accounts receivable	304.4	347.2
Accrued unbilled revenues	67.9	76.2
Advances to parent	0.0	78.3
Fuel inventories	108.8	112.0
Materials and supplies, at average cost	212.9	212.7
Other	76.9	71.5
Total current assets	771.1	898.1
OTHER PROPERTY AND INVESTMENTS
Total other property and investments	3.6	4.1
PROPERTY, PLANT AND EQUIPMENT
In service	17,403.5	17,196.9
Construction work in progress	744.3	744.9
Total property, plant and equipment	18,147.8	17,941.8
Less: accumulated depreciation	5,243.1	5,217.5
Net property, plant and equipment	12,904.7	12,724.3
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	555.9	557.2
Other	66.4	93.8
Total deferred charges and other assets	622.3	651.0
TOTAL ASSETS	14,301.7	14,277.5
CURRENT LIABILITIES
Accounts payable	281.8	348.7
Advances from parent	23.0	0.0
Customer deposits	125.3	127.2
Accrued taxes	32.1	52.3
Accrued interest	75.4	66.4
Accrued compensation	33.4	54.3
Fuel clause over recoveries	55.3	27.1
Other	39.5	33.5
Total current liabilities	665.8	709.5
LONG-TERM DEBT	4,961.9	4,961.7
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	86.4	93.2
Deferred income taxes	1,552.9	1,531.3
Deferred investment tax credits	9.6	9.8
Regulatory liabilities	941.9	957.1
Other	281.3	274.7
Total deferred credits and other liabilities	2,872.1	2,866.1
Total liabilities	8,499.8	8,537.3
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,757.3	1,753.5
Retained earnings	4,044.6	3,986.7
Total stockholders' equity	5,801.9	5,740.2
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 14,301.7	$ 14,277.5