CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 252.7	$ 243.6
Adjustments to reconcile net income to net cash provided from operating activities
Depreciation and amortization	185.9	158.8
Deferred income taxes and investment tax credits, net	95.1	83.6
Allowance for equity funds used during construction	(4.9)	(16.1)
Stock-based compensation expense	1.8	2.2
Regulatory assets	17.5	9.6
Regulatory liabilities	(12.8)	0.6
Other assets	(3.4)	(3.2)
Other liabilities	(32.2)	(53.6)
Change in certain current assets and liabilities
Accounts receivable, net	(85.2)	(115.0)
Accrued unbilled revenues	(3.2)	(9.8)
Fuel, materials and supplies inventories	4.7	59.9
Gas imbalance assets	0	0.1
Fuel clause under recoveries	1.0	(32.2)
Other current assets	(11.3)	4.7
Accounts payable	(47.7)	(22.1)
Accounts payable - affiliates	(1.3)	(3.3)
Income taxes payable - parent	(7.1)	23.4
Gas imbalance liabilities	0.1	0.1
Fuel clause over recoveries	99.4	(21.4)
Other current liabilities	29.4	34.9
Net Cash Provided from Operating Activities	478.5	344.8
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(495.8)	(620.4)
Reimbursement of capital expenditures	28.2	37.2
Proceeds from sale of assets	0.5	0.5
Net Cash Used in Investing Activities	(467.1)	(582.7)
CASH FLOWS FROM FINANCING ACTIVITIES
Changes in advances with parent	(11.4)	(58.4)
Proceeds from long-term debt	0	246.3
Capital contribution from OGE Energy	0	50.0
Net Cash Provided from (Used in) Financing Activities	(11.4)	237.9
NET CHANGE IN CASH AND CASH EQUIVALENTS	0	0
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	0	0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 0	$ 0