CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 0	$ 1.8
Accounts receivable, less reserve of $1.5 and $2.6, respectively	186.7	295.3
Accounts receivable - unconsolidated affiliates	9.1	0
Accrued unbilled revenues	83.2	57.4
Income taxes receivable	10.7	7.2
Fuel inventories	98.7	93.3
Materials and supplies, at average cost	81.5	80.9
Deferred income taxes	97.7	187.7
Fuel clause under recoveries	1.7	0
Assets held for sale	0	25.5
Other	37.7	45.1
Total current assets	607.0	794.2
OTHER PROPERTY AND INVESTMENTS
Investment in unconsolidated affiliates	1,267.2	0
Other	55.9	52.2
Total other property and investments	1,323.1	52.2
PROPERTY, PLANT AND EQUIPMENT
In service	8,849.7	11,504.4
Construction work in progress	421.4	387.5
Total property, plant and equipment	9,271.1	11,891.9
Less accumulated depreciation	2,888.2	3,547.1
Net property, plant and equipment	6,382.9	8,344.8
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	501.9	510.6
Intangible assets, net	0	127.4
Goodwill	0	39.4
Other	33.6	53.6
Total deferred charges and other assets	535.5	731.0
TOTAL ASSETS	8,848.5	9,922.2
CURRENT LIABILITIES
Short-term debt	478.7	430.9
Accounts payable	219.6	396.7
Dividends payable	41.4	41.2
Customer deposits	69.7	70.3
Accrued taxes	40.3	48.1
Accrued interest	45.1	55.0
Accrued compensation	39.5	55.2
Fuel clause over recoveries	21.8	109.2
Other	60.5	69.8
Total current liabilities	1,016.6	1,276.4
LONG-TERM DEBT	2,400.2	2,848.6
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	366.9	399.8
Deferred income taxes	1,916.2	1,948.8
Deferred investment tax credits	2.9	3.9
Regulatory liabilities	244.4	245.1
Deferred revenues	0.2	37.7
Other	89.8	89.5
Total deferred credits and other liabilities	2,620.4	2,724.8
Total liabilities	6,037.2	6,849.8
COMMITMENTS AND CONTINGENCIES (NOTE 13)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,059.7	1,047.4
Retained earnings	1,804.9	1,772.4
Accumulated other comprehensive loss, net of tax	(53.3)	(49.1)
Treasury stock, at cost	0	(3.5)
Total OGE Energy stockholders' equity	2,811.3	2,767.2
Noncontrolling interests	0	305.2
Total stockholders' equity	2,811.3	3,072.4
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 8,848.5	$ 9,922.2