CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
CURRENT ASSETS
Cash and cash equivalents	$ 307.0	$ 88.1
Accounts receivable	215.8	250.1
Accrued unbilled revenues	65.1	74.2
Income taxes receivable	14.8	20.7
Fuel inventories	128.6	108.8
Materials and supplies, at average cost	198.7	180.5
Fuel clause under recoveries	370.1	514.9
Other	101.0	103.5
Total current assets	1,401.1	1,340.8
OTHER PROPERTY AND INVESTMENTS
Other	107.1	105.8
Total other property and investments	107.1	105.8
PROPERTY, PLANT AND EQUIPMENT
In service	14,866.8	14,695.2
Construction work in progress	484.9	436.1
Total property, plant and equipment	15,351.7	15,131.3
Less: accumulated depreciation	4,632.0	4,584.5
Net property, plant and equipment	10,719.7	10,546.8
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	531.6	524.3
Other	30.8	27.0
Total deferred charges and other assets	562.4	551.3
TOTAL ASSETS	12,790.3	12,544.7
CURRENT LIABILITIES
Accounts payable	327.6	448.9
Dividends payable	82.9	82.9
Customer deposits	92.4	88.8
Accrued taxes	35.8	54.0
Accrued interest	48.7	41.1
Accrued compensation	28.5	37.0
Long-term debt due within one year	1,000.0	999.9
Other	50.0	49.6
Total current liabilities	1,665.9	1,802.2
LONG-TERM DEBT	3,994.1	3,548.7
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	172.5	176.9
Deferred income taxes	1,248.7	1,233.5
Deferred investment tax credits	11.8	12.0
Regulatory liabilities	1,123.2	1,147.1
Other	204.1	210.9
Total deferred credits and other liabilities	2,760.3	2,780.4
Total liabilities	8,420.3	8,131.3
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,135.2	1,134.5
Retained earnings	3,245.6	3,290.9
Accumulated other comprehensive loss, net of tax	(10.8)	(11.9)
Treasury stock, at cost	0.0	(0.1)
Total stockholders' equity	4,370.0	4,413.4
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	12,790.3	12,544.7
OG&E [Member]
CURRENT ASSETS
Accounts receivable	214.6	249.4
Accrued unbilled revenues	65.1	74.2
Advances to parent	412.7	91.0
Fuel inventories	128.6	108.8
Materials and supplies, at average cost	198.7	180.5
Fuel clause under recoveries	370.1	514.9
Other	94.7	97.8
Total current assets	1,484.5	1,316.6
OTHER PROPERTY AND INVESTMENTS
Total other property and investments	4.6	4.4
PROPERTY, PLANT AND EQUIPMENT
In service	14,860.7	14,689.1
Construction work in progress	484.9	436.1
Total property, plant and equipment	15,345.6	15,125.2
Less: accumulated depreciation	4,632.0	4,584.5
Net property, plant and equipment	10,713.6	10,540.7
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	531.6	524.3
Other	28.4	24.5
Total deferred charges and other assets	560.0	548.8
TOTAL ASSETS	12,762.7	12,410.5
CURRENT LIABILITIES
Accounts payable	290.9	395.8
Customer deposits	92.4	88.8
Accrued taxes	28.8	46.5
Accrued interest	47.5	40.8
Accrued compensation	22.6	27.8
Long-term debt due within one year	500.0	500.0
Other	49.6	49.3
Total current liabilities	1,031.8	1,149.0
LONG-TERM DEBT	3,944.3	3,498.9
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	96.2	98.3
Deferred income taxes	1,284.8	1,271.1
Deferred investment tax credits	11.8	12.0
Regulatory liabilities	1,123.2	1,147.1
Other	185.0	188.9
Total deferred credits and other liabilities	2,701.0	2,717.4
Total liabilities	7,677.1	7,365.3
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,575.2	1,574.6
Retained earnings	3,510.4	3,470.6
Total stockholders' equity	5,085.6	5,045.2
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 12,762.7	$ 12,410.5