CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Adjustments to reconcile net income to net cash provided from (used in) operating activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 279.5	$ 52.7
Depreciation and amortization	107.4	98.7
Deferred income taxes and other tax credits, net	47.5	8.7
Equity Securities, FV-NI, Gain (Loss)	(282.3)	0.0
Equity in earnings of unconsolidated affiliates	0.0	(53.2)
Distributions from unconsolidated affiliates	0.0	18.3
Allowance for equity funds used during construction	(1.3)	(1.3)
Stock-based compensation expense	2.3	2.5
Regulatory assets	(35.5)	(859.9)
Regulatory liabilities	(19.1)	(16.3)
Other assets	4.3	(5.5)
Other liabilities	(6.4)	(45.4)
Change in certain current assets and liabilities:
Accounts receivable and accrued unbilled revenues, net	0.4	26.0
Increase (Decrease) in Income Taxes Receivable	1.6	1.7
Fuel, materials and supplies inventories	(25.3)	(7.0)
Fuel recoveries	(30.4)	(104.9)
Other current assets	10.0	(2.5)
Accounts payable	24.5	(28.7)
Other current liabilities	(18.3)	(24.1)
Net cash provided from (used in) operating activities	58.9	(940.2)
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(220.1)	(158.4)
Other	(0.3)	(0.6)
Net cash used in investing activities	(220.4)	(159.0)
CASH FLOWS FROM FINANCING ACTIVITIES
Increase in short-term debt	244.6	1,183.1
Dividends paid on common stock	(82.3)	(81.7)
Net cash provided from financing activities	161.5	1,098.1
NET CHANGE IN CASH AND CASH EQUIVALENTS	0.0	(1.1)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	0.0	1.1
CASH AND CASH EQUIVALENTS AT END OF PERIOD	0.0	0.0
Proceeds from (Payments for) Other Financing Activities	(0.8)	(3.3)
Net Income (Loss) Attributable to Parent	279.5	52.7
OG&E [Member]
Adjustments to reconcile net income to net cash provided from (used in) operating activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	39.0	11.2
Depreciation and amortization	107.4	98.7
Deferred income taxes and other tax credits, net	4.5	0.8
Allowance for equity funds used during construction	(1.3)	(1.3)
Stock-based compensation expense	0.8	0.4
Regulatory assets	(35.5)	(859.9)
Regulatory liabilities	(19.1)	(16.3)
Other assets	0.5	(4.4)
Other liabilities	(8.5)	(34.8)
Change in certain current assets and liabilities:
Accounts receivable and accrued unbilled revenues, net	0.2	27.7
Fuel, materials and supplies inventories	(25.3)	(7.0)
Fuel recoveries	(30.4)	(104.9)
Other current assets	9.2	0.6
Accounts payable	27.6	(29.1)
Increase (Decrease) in Income Taxes Payable	2.8	0.8
Other current liabilities	(20.5)	(22.4)
Net cash provided from (used in) operating activities	51.4	(939.9)
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(220.1)	(158.4)
Net cash used in investing activities	(220.1)	(158.4)
CASH FLOWS FROM FINANCING ACTIVITIES
Increase in short-term debt	182.5	0.0
Increase (Decrease) in Due from Related Parties, Current	(13.8)	568.3
Proceeds from Contributions from Parent	0.0	530.0
Net cash provided from financing activities	168.7	1,098.3
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
Net Income (Loss) Attributable to Parent	$ 39.0	$ 11.2