CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 0	$ 1.8
Accounts receivable, less reserve of $2.0 and $2.6, respectively	257.2	295.3
Accounts receivable - unconsolidated affiliates	9.0	0
Accrued unbilled revenues	70.7	57.4
Income taxes receivable	5.6	7.2
Fuel inventories	75.5	93.3
Materials and supplies, at average cost	79.5	80.9
Deferred income taxes	230.2	187.7
Assets held for sale	0	25.5
Other	30.3	45.1
Total current assets	758.0	794.2
OTHER PROPERTY AND INVESTMENTS
Investment in unconsolidated affiliates	1,295.8	0
Other	56.2	52.2
Total other property and investments	1,352.0	52.2
PROPERTY, PLANT AND EQUIPMENT
In service	8,929.5	11,504.4
Construction work in progress	501.1	387.5
Total property, plant and equipment	9,430.6	11,891.9
Less accumulated depreciation	2,935.0	3,547.1
Net property, plant and equipment	6,495.6	8,344.8
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	496.2	510.6
Intangible assets, net	0	127.4
Goodwill	0	39.4
Other	42.4	53.6
Total deferred charges and other assets	538.6	731.0
TOTAL ASSETS	9,144.2	9,922.2
CURRENT LIABILITIES
Short-term debt	447.0	430.9
Accounts payable	171.1	396.7
Dividends payable	41.4	41.2
Customer deposits	69.5	70.3
Accrued taxes	57.2	48.1
Accrued interest	33.6	55.0
Accrued compensation	53.3	55.2
Fuel clause over recoveries	12.0	109.2
Other	56.4	69.8
Total current liabilities	941.5	1,276.4
LONG-TERM DEBT	2,400.0	2,848.6
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	367.7	399.8
Deferred income taxes	2,105.3	1,948.8
Deferred investment tax credits	2.4	3.9
Regulatory liabilities	242.7	245.1
Deferred revenues	0.3	37.7
Other	89.7	89.5
Total deferred credits and other liabilities	2,808.1	2,724.8
Total liabilities	6,149.6	6,849.8
COMMITMENTS AND CONTINGENCIES (NOTE 13)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,067.8	1,047.4
Retained earnings	1,978.7	1,772.4
Accumulated other comprehensive loss, net of tax	(51.9)	(49.1)
Treasury stock, at cost	0	(3.5)
Total OGE Energy stockholders' equity	2,994.6	2,767.2
Noncontrolling interests	0	305.2
Total stockholders' equity	2,994.6	3,072.4
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 9,144.2	$ 9,922.2