CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
CURRENT ASSETS
Cash and cash equivalents	$ 9.9	$ 0.2
Accounts receivable	330.5	208.8
Accrued unbilled revenues	88.2	72.7
Income taxes receivable	0.0	18.2
Fuel inventories	123.4	158.5
Materials and supplies, at average cost	238.2	254.3
Fuel clause under recoveries	43.3	0.0
Other	63.0	58.8
Total current assets	896.5	771.5
OTHER PROPERTY AND INVESTMENTS
Other	122.6	114.0
Total other property and investments	122.6	114.0
PROPERTY, PLANT AND EQUIPMENT
In service	16,048.6	15,588.2
Construction work in progress	783.7	522.2
Total property, plant and equipment	16,832.3	16,110.4
Less: accumulated depreciation	5,000.3	4,809.4
Net property, plant and equipment	11,832.0	11,301.0
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	572.7	577.6
Other	52.0	26.6
Total deferred charges and other assets	624.7	604.2
TOTAL ASSETS	13,475.8	12,790.7
CURRENT LIABILITIES
Short-term debt	215.2	499.2
Accounts payable	269.8	276.4
Dividends payable	84.6	83.8
Customer deposits	110.0	103.5
Accrued taxes	101.4	47.6
Accrued interest	72.9	57.4
Accrued compensation	54.2	46.8
Long-term debt due within one year	32.4	0.0
Fuel clause over recoveries	16.4	20.5
Other	84.6	44.0
Total current liabilities	1,041.5	1,179.2
LONG-TERM DEBT	5,020.8	4,340.5
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	166.9	172.7
Deferred income taxes	1,361.6	1,300.8
Deferred investment tax credits	10.7	11.3
Regulatory liabilities	1,014.6	1,061.6
Other	242.6	213.0
Total deferred credits and other liabilities	2,796.4	2,759.4
Total liabilities	8,858.7	8,279.1
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,161.7	1,145.1
Retained earnings	3,458.5	3,373.7
Accumulated other comprehensive loss, net of tax	(3.1)	(7.2)
Total stockholders' equity	4,617.1	4,511.6
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	13,475.8	12,790.7
OG&E [Member]
CURRENT ASSETS
Cash and cash equivalents	9.9	0.2
Accounts receivable	330.0	208.8
Accrued unbilled revenues	88.2	72.7
Advances to parent	17.6	0.0
Fuel inventories	123.4	158.5
Materials and supplies, at average cost	238.2	254.3
Fuel clause under recoveries	43.3	0.0
Other	56.8	46.7
Total current assets	907.4	741.2
OTHER PROPERTY AND INVESTMENTS
Total other property and investments	4.5	4.6
PROPERTY, PLANT AND EQUIPMENT
In service	16,042.5	15,582.1
Construction work in progress	783.7	522.2
Total property, plant and equipment	16,826.2	16,104.3
Less: accumulated depreciation	5,000.3	4,809.4
Net property, plant and equipment	11,825.9	11,294.9
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	572.7	577.6
Other	50.0	24.3
Total deferred charges and other assets	622.7	601.9
TOTAL ASSETS	13,360.5	12,642.6
CURRENT LIABILITIES
Accounts payable	234.7	228.5
Advances from parent	0.0	147.7
Customer deposits	110.0	103.5
Accrued taxes	71.5	47.2
Accrued interest	65.4	56.6
Accrued compensation	54.2	37.0
Long-term debt due within one year	32.4	0.0
Fuel clause over recoveries	16.4	20.5
Other	84.6	43.6
Total current liabilities	669.2	684.6
LONG-TERM DEBT	4,614.3	4,290.6
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	98.7	96.2
Deferred income taxes	1,399.8	1,340.8
Deferred investment tax credits	10.7	11.3
Regulatory liabilities	1,014.6	1,061.6
Other	210.3	182.8
Total deferred credits and other liabilities	2,734.1	2,692.7
Total liabilities	8,017.6	7,667.9
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,586.4	1,577.7
Retained earnings	3,756.5	3,397.0
Total stockholders' equity	5,342.9	4,974.7
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 13,360.5	$ 12,642.6