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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
CURRENT ASSETS    
Cash and cash equivalents $ 0.9 $ 0.2
Accounts receivable 323.7 347.8
Accrued unbilled revenues 105.0 76.2
Income taxes receivable 25.5 37.3
Fuel inventories 110.6 112.0
Materials and supplies, at average cost 214.2 212.7
Other 63.7 71.7
Total current assets 843.6 857.9
OTHER PROPERTY AND INVESTMENTS    
Other 118.8 129.4
Total other property and investments 118.8 129.4
PROPERTY, PLANT AND EQUIPMENT    
In service 17,565.0 17,203.0
Construction work in progress 769.0 744.9
Total property, plant and equipment 18,334.0 17,947.9
Less: accumulated depreciation 5,312.4 5,217.5
Net property, plant and equipment 13,021.6 12,730.4
DEFERRED CHARGES AND OTHER ASSETS    
Regulatory assets 562.4 557.2
Other 80.2 95.6
Total deferred charges and other assets 642.6 652.8
TOTAL ASSETS 14,626.6 14,370.5
CURRENT LIABILITIES    
Short-term debt 129.1 292.0
Accounts payable 282.2 350.6
Customer deposits 121.0 127.2
Accrued taxes 50.3 53.0
Accrued interest 74.1 68.8
Dividends payable 87.8 87.6
Accrued compensation 38.5 54.3
Long-term debt due within one year 115.9 0.0
Fuel clause over recoveries 152.0 27.1
Other 48.6 33.5
Total current liabilities 1,099.5 1,094.1
LONG-TERM DEBT 5,598.2 5,369.2
DEFERRED CREDITS AND OTHER LIABILITIES    
Accrued benefit obligations 157.4 164.4
Deferred income taxes 1,535.3 1,489.3
Deferred investment tax credits 9.4 9.8
Regulatory liabilities 935.6 957.1
Other 310.0 309.3
Total deferred credits and other liabilities 2,947.7 2,929.9
Total liabilities 9,645.4 9,393.2
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY    
Common stockholders' equity 1,392.7 1,378.4
Retained earnings 3,591.0 3,601.5
Accumulated other comprehensive loss, net of tax (2.5) (2.6)
Total stockholders' equity 4,981.2 4,977.3
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY 14,626.6 14,370.5
OG&E [Member]    
CURRENT ASSETS    
Cash and cash equivalents 0.9 0.2
Accounts receivable 323.2 347.2
Accrued unbilled revenues 105.0 76.2
Advances to parent 550.5 78.3
Fuel inventories 110.6 112.0
Materials and supplies, at average cost 214.2 212.7
Other 63.0 71.5
Total current assets 1,367.4 898.1
OTHER PROPERTY AND INVESTMENTS    
Total other property and investments 4.1 4.1
PROPERTY, PLANT AND EQUIPMENT    
In service 17,558.9 17,196.9
Construction work in progress 769.0 744.9
Total property, plant and equipment 18,327.9 17,941.8
Less: accumulated depreciation 5,312.4 5,217.5
Net property, plant and equipment 13,015.5 12,724.3
DEFERRED CHARGES AND OTHER ASSETS    
Regulatory assets 562.4 557.2
Other 76.9 93.8
Total deferred charges and other assets 639.3 651.0
TOTAL ASSETS 15,026.3 14,277.5
CURRENT LIABILITIES    
Accounts payable 280.7 348.7
Customer deposits 121.0 127.2
Accrued taxes 49.9 52.3
Accrued interest 71.7 66.4
Accrued compensation 38.5 54.3
Long-term debt due within one year 56.0 0.0
Fuel clause over recoveries 152.0 27.1
Other 48.5 33.5
Total current liabilities 818.3 709.5
LONG-TERM DEBT 5,250.3 4,961.7
DEFERRED CREDITS AND OTHER LIABILITIES    
Accrued benefit obligations 87.1 93.2
Deferred income taxes 1,575.7 1,531.3
Deferred investment tax credits 9.4 9.8
Regulatory liabilities 935.6 957.1
Other 274.0 274.7
Total deferred credits and other liabilities 2,881.8 2,866.1
Total liabilities 8,950.4 8,537.3
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY    
Common stockholders' equity 1,911.2 1,753.5
Retained earnings 4,164.7 3,986.7
Total stockholders' equity 6,075.9 5,740.2
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 15,026.3 $ 14,277.5