CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 38.3	$ 279.5
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation and amortization	121.2	107.4
Deferred income taxes and other tax credits, net	0.9	47.5
Gain on investment in equity securities	0.0	(282.3)
Allowance for equity funds used during construction	(4.5)	(1.3)
Stock-based compensation expense	3.0	2.3
Regulatory assets	(14.8)	(35.5)
Regulatory liabilities	(27.2)	(19.1)
Other assets	(2.2)	4.3
Other liabilities	(6.4)	(6.4)
Change in certain current assets and liabilities:
Accounts receivable and accrued unbilled revenues, net	43.4	0.4
Income taxes receivable	5.9	1.6
Fuel, materials and supplies inventories	(38.0)	(25.3)
Fuel recoveries	144.8	(30.4)
Other current assets	2.3	10.0
Accounts payable	(103.8)	24.5
Other current liabilities	(15.1)	(18.3)
Net cash provided from operating activities	147.8	58.9
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(286.0)	(220.1)
Other	(1.7)	(0.3)
Net cash provided used in investing activities	(287.7)	(220.4)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from long-term debt	444.7	0.0
Increase (decrease) in short-term debt	0.0	244.6
Dividends paid on common stock	(83.6)	(82.3)
Cash paid for employee equity-based compensation and expense of common stock	(2.3)	(0.8)
Net cash provided from financing activities	358.8	161.5
NET CHANGE IN CASH AND CASH EQUIVALENTS	218.9	0.0
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	88.1	0.0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	307.0	0.0
OG&E [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	39.8	39.0
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation and amortization	121.2	107.4
Deferred income taxes and other tax credits, net	(0.4)	4.5
Allowance for equity funds used during construction	(4.5)	(1.3)
Stock-based compensation expense	0.6	0.8
Regulatory assets	(14.8)	(35.5)
Regulatory liabilities	(27.2)	(19.1)
Other assets	(2.9)	0.5
Other liabilities	(2.8)	(8.5)
Change in certain current assets and liabilities:
Accounts receivable and accrued unbilled revenues, net	43.9	0.2
Fuel, materials and supplies inventories	(38.0)	(25.3)
Fuel recoveries	144.8	(30.4)
Other current assets	3.1	9.2
Accounts payable	(87.4)	27.6
Income taxes payable - parent	6.9	2.8
Other current liabilities	(12.3)	(20.5)
Net cash provided from operating activities	170.0	51.4
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(286.0)	(220.1)
Net cash provided used in investing activities	(286.0)	(220.1)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from long-term debt	444.7	0.0
Increase (decrease) in short-term debt	0.0	182.5
Changes in advances with parent	(328.7)	(13.8)
Net cash provided from financing activities	116.0	168.7
NET CHANGE IN CASH AND CASH EQUIVALENTS	0.0	0.0
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	0.0	0.0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 0.0	$ 0.0