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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
CURRENT ASSETS    
Cash and cash equivalents $ 0.3 $ 0.6
Accounts receivable 438.8 240.6
Accrued unbilled revenues 93.7 74.6
Income taxes receivable 0.1 0.0
Fuel inventories 123.2 148.3
Materials and supplies, at average cost 219.1 229.4
Fuel clause under recoveries 38.5 112.7
Other 74.0 88.9
Total current assets 987.7 895.1
OTHER PROPERTY AND INVESTMENTS    
Other 137.4 124.2
Total other property and investments 137.4 124.2
PROPERTY, PLANT AND EQUIPMENT    
In service 16,976.1 16,254.6
Construction work in progress 708.8 814.2
Total property, plant and equipment 17,684.9 17,068.8
Less: accumulated depreciation 5,166.5 4,982.2
Net property, plant and equipment 12,518.4 12,086.6
DEFERRED CHARGES AND OTHER ASSETS    
Regulatory assets 546.7 568.1
Other 67.2 42.0
Total deferred charges and other assets 613.9 610.1
TOTAL ASSETS 14,257.4 13,716.0
CURRENT LIABILITIES    
Short-term debt 466.3 469.3
Accounts payable 275.7 305.7
Dividends payable 85.6 84.7
Customer deposits 122.8 111.1
Accrued taxes 97.7 58.8
Accrued interest 82.5 63.8
Accrued compensation 51.5 53.0
Long-term debt due within one year 0.0 32.4
Fuel clause over recoveries 10.0 9.3
Other 45.0 41.7
Total current liabilities 1,237.1 1,229.8
LONG-TERM DEBT 5,368.2 5,020.9
DEFERRED CREDITS AND OTHER LIABILITIES    
Accrued benefit obligations 160.8 170.9
Deferred income taxes 1,429.8 1,371.1
Deferred investment tax credits 10.0 10.6
Regulatory liabilities 971.2 1,016.4
Other 283.2 255.4
Total deferred credits and other liabilities 2,855.0 2,824.4
Total liabilities 9,460.3 9,075.1
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY    
Common stockholders' equity 1,179.6 1,167.9
Retained earnings 3,619.9 3,475.7
Accumulated other comprehensive loss, net of tax (2.4) (2.7)
Total stockholders' equity 4,797.1 4,640.9
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY 14,257.4 13,716.0
OG&E [Member]    
CURRENT ASSETS    
Cash and cash equivalents 0.3 0.2
Accounts receivable 438.4 240.1
Accrued unbilled revenues 93.7 74.6
Fuel inventories 123.2 148.3
Materials and supplies, at average cost 219.1 229.4
Fuel clause under recoveries 38.5 112.7
Other 72.9 83.2
Total current assets 986.1 888.5
OTHER PROPERTY AND INVESTMENTS    
Total other property and investments 4.3 4.5
PROPERTY, PLANT AND EQUIPMENT    
In service 16,970.0 16,248.5
Construction work in progress 708.8 814.2
Total property, plant and equipment 17,678.8 17,062.7
Less: accumulated depreciation 5,166.5 4,982.2
Net property, plant and equipment 12,512.3 12,080.5
DEFERRED CHARGES AND OTHER ASSETS    
Regulatory assets 546.7 568.1
Other 65.3 39.7
Total deferred charges and other assets 612.0 607.8
TOTAL ASSETS 14,114.7 13,581.3
CURRENT LIABILITIES    
Accounts payable 271.6 272.2
Advances from parent 53.9 247.6
Customer deposits 122.8 111.1
Accrued taxes 74.3 51.4
Accrued interest 75.4 61.4
Accrued compensation 51.5 53.0
Long-term debt due within one year 0.0 32.4
Fuel clause over recoveries 10.0 9.3
Other 45.0 41.8
Total current liabilities 704.5 880.2
LONG-TERM DEBT 4,960.9 4,614.3
DEFERRED CREDITS AND OTHER LIABILITIES    
Accrued benefit obligations 90.5 102.2
Deferred income taxes 1,472.1 1,410.7
Deferred investment tax credits 10.0 10.6
Regulatory liabilities 971.2 1,016.4
Other 247.4 220.5
Total deferred credits and other liabilities 2,791.2 2,760.4
Total liabilities 8,456.6 8,254.9
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY    
Common stockholders' equity 1,749.6 1,589.5
Retained earnings 3,908.5 3,736.9
Total stockholders' equity 5,658.1 5,326.4
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 14,114.7 $ 13,581.3