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Income Taxes | 12 Months Ended
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Dec. 31, 2014
Income Taxes [Abstract] |
Income Tax Disclosure [Text Block] | Income Taxes The items comprising income tax expense are as follows:
Year ended December 31 (In millions) | 2014 | 2013 | 2012
Provision (Benefit) for Current Income Taxes |  |  |
Federal | $ | — |  | $ | — |  | $ | (9.1 | )
State | (4.5 | ) | 4.3 |  | 0.5 |
Total Provision (Benefit) for Current Income Taxes | (4.5 | ) | 4.3 |  | (8.6 | )
Provision for Deferred Income Taxes, net |  |  |
Federal | 160.0 |  | 154.4 |  | 147.3 |
State | 18.2 |  | (26.4 | ) | (1.5 | )
Total Provision for Deferred Income Taxes, net | 178.2 |  | 128.0 |  | 145.8 |
Deferred Federal Investment Tax Credits, net | (0.9 | ) | (2.0 | ) | (2.1 | )
Total Income Tax Expense | $ | 172.8 |  | $ | 130.3 |  | $ | 135.1 |
The Company file s consolidated income tax returns in the U.S. Federal jurisdiction and various state jurisdictions. With few exceptions, the Company is no longer subject to U.S. Federal tax examinations by tax authorities for years prior to 2011 or state and local tax examinations by tax authorities for years prior to 2010. Income taxes are generally allocated to each company in the affiliated group based on its stand-alone taxable income or loss. Federal investment tax credits previously claimed on electric utility property have been deferred and are being amortized to income over the life of the related property. OG&E earns both Federal and Oklahoma state tax credits associated with production from its wind farms. In addition, OG&E and Enable earn Oklahoma state tax credits associated with their investments in electric generating and natural gas processing facilities which further reduce the Company's effective tax rate. The following schedule reconciles the statutory tax rates to the effective income tax rate:
Year ended December 31 | 2014 | 2013 | 2012
Statutory Federal tax rate | 35.0 | % | 35.0 | % | 35.0 | %
Amortization of net unfunded deferred taxes | 0.6 |  | 0.6 |  | 0.8 |
State income taxes, net of Federal income tax benefit | 1.2 |  | 0.4 |  | (0.1 | )
Federal investment tax credits, net | (0.2 | ) | (0.4 | ) | (0.4 | )
401(k) dividends | (0.5 | ) | (0.5 | ) | (0.5 | )
Income attributable to noncontrolling interest | — |  | (0.3 | ) | (1.6 | )
Federal renewable energy credit (A) | (6.7 | ) | (7.2 | ) | (7.2 | )
Uncertain tax positions | 0.5 |  | 1.5 |  | — |
Remeasurement of state deferred tax liabilities | 0.4 |  | (4.1 | ) | — |
Other | 0.1 |  | (0.1 | ) | — |
Effective income tax rate | 30.4 | % | 24.9 | % | 26.0 | %
(A) | Represents credits associated with the production from OG&E's wind farms.
The deferred tax provisions are recognized as costs in the ratemaking process by the commissions having jurisdiction over the rates charged by OG&E. The components of Deferred Income Taxes at December 31, 2014 and 2013, respectively, were as follows:
December 31 (In millions) | 2014 | 2013
Current Deferred Income Tax Assets |  |
Net operating losses | $ | 158.4 |  | $ | 180.1 |
Accrued liabilities | 15.6 |  | 22.3 |
Federal tax credits | 12.4 |  | 8.0 |
Accrued vacation | 4.4 |  | 4.7 |
Uncollectible accounts | 0.6 |  | 0.7 |
Total Current Deferred Income Tax Assets | $ | 191.4 |  | $ | 215.8 |
Non-Current Deferred Income Tax Liabilities |  |
Accelerated depreciation and other property related differences | $ | 1,936.8 |  | $ | 1,753.3 |
Investment in Enable Midstream Partners | 641.8 |  | 630.5 |
Company pension plan | 34.6 |  | 55.1 |
Income taxes refundable to customers, net | 21.7 |  | 21.9 |
Regulatory asset | 24.7 |  | 26.1 |
Bond redemption-unamortized costs | 5.3 |  | 3.6 |
Derivative instruments | 1.8 |  | 1.6 |
Total Non-Current Deferred Income Tax Liabilities | 2,666.7 |  | 2,492.1 |
Non-Current Deferred Income Tax Assets |  |
Federal tax credits | (139.0 | ) | (105.2 | )
State tax credits | (98.6 | ) | (92.6 | )
Postretirement medical and life insurance benefits | (56.4 | ) | (62.8 | )
Regulatory liabilities | (58.0 | ) | (61.3 | )
Asset retirement obligations | (21.4 | ) | (20.8 | )
Net operating losses | (19.8 | ) | (18.8 | )
Other | (4.8 | ) | (4.6 | )
Deferred Federal investment tax credits | (0.4 | ) | (0.7 | )
Total Non-Current Deferred Income Tax Assets | (398.4 | ) | (366.8 | )
Non-Current Deferred Income Tax Liabilities, net | $ | 2,268.3 |  | $ | 2,125.3 |
As of December 31, 2014, the Company has classified $10.5 million of unrecognized tax benefits as a reduction of deferred tax assets recorded. Management is currently unaware of any issues under review that could result in significant additional payments, accruals, or other material deviation from this amount. Following is a reconciliation of the Company’s total gross unrecognized tax benefits as of the years ended December 31, 2014, 2013, and 2012.
(Millions) | 2014 | 2013 | 2012
Balance at January 1 | $ | 7.8 |  | $ | — |  | $ | — |
Tax positions related to current year: |  |  |
Additions | 2.7 |  | 2.7 |  | — |
Tax positions related to prior years: |  |  |
Additions | — |  | 5.1 |  | — |
Balance at December 31 | $ | 10.5 |  | $ | 7.8 |  | $ | — |
Where applicable, the Company classifies income tax-related interest and penalties as interest expense and other operation and maintenance expense, respectively. During the year ended December 31, 2014, there were no income tax-related interest or penalties recorded with regard to uncertain tax positions. The total amount of unrecognized tax benefits that would impact the effective tax rate, if recognized, was $10.5 million as of December 31, 2014. As previously reported, in January 2013, OG&E determined that a portion of certain Oklahoma investment tax credits previously recognized but not yet utilized may not be available for utilization in future years. During 2014, OG&E recorded an additional reserve for this item of $4.2 million ($2.7 million after the federal tax benefit) related to the same Oklahoma investment tax credits generated in the current year but not yet utilized due to management's determination that it is more likely than not that it will be unable to utilize these credits. Other The Company sustained Federal and state tax operating losses through 2013 caused primarily by bonus depreciation and other book verses tax temporary differences. As a result, the Company had accrued Federal and state income tax benefits carrying into 2014. As the Company can no longer carry these losses back to prior periods, these losses are being carried forward for utilization in future years. In addition to the operating losses, the Company was unable to utilize the various tax credits that were generating during these years. These tax losses and credits are being carried as deferred tax assets and will be utilized in future periods. Under current law, the Company anticipates future taxable income will be sufficient to utilize all of the losses and credits before they begin to expire, accordingly no valuation allowance is considered necessary. The following table summarizes these carry forwards:
(In millions) | Carry Forward Amount | Deferred Tax Asset | Earliest Expiration Date
Net operating losses |  |  |
State operating loss | $ | 857.0 |  | $ | 31.6 |  | 2030
Federal operating loss | 418.6 |  | 146.6 |  | 2030
Federal tax credits | 151.5 |  | 151.4 |  | 2029
State tax credits |  |  |
Oklahoma investment tax credits | 115.3 |  | 75.1 |  | N/A
Oklahoma capital investment board credits | 7.3 |  | 7.3 |  | N/A
Oklahoma zero emission tax credits | 24.3 |  | 16.2 |  | 2020
Acquisition of the equity interest in Enable on May 1, 2013, increased the Company's utilization of state net operating loss carryforwards. Under current tax law, the Company projects full utilization of all Federal operating losses in 2015 as well as partial utilization of State operating loss carryforwards. Accordingly, a current deferred tax asset of $158.4 million has been reflected on the balance sheet. Prior to 2014, the Company had a Federal tax operating loss primarily caused by the accelerated tax "bonus" depreciation provision contained within the Tax Relief, Unemployment Insurance Reauthorization and Job Creation Act of 2010 which allowed the Company to record a current income tax deduction for 100 percent of the cost of certain property placed into service in 2011 and 50 percent for certain property placed into service in 2012. During 2013, the Company began to utilize these net operating losses. On December 19, 2014, the Tax Increase Prevention Act of 2014 was signed into law. Among other things, the law included an extension of bonus depreciation for one year for property generally placed in service before January 1, 2015. The impact of the new law was reflected in the Company's 2014 Consolidated Financial Statements as an increase in Deferred Tax Liabilities with a corresponding increase in Deferred Tax Assets related to the net operating loss. With this extension of bonus depreciation the Company's utilization of net operating losses will continue into 2015. The Company has generated excess tax benefits of $31.6 million related to its equity based compensation plan which have not been recognized during the time it has been in a net operating loss position. This balance is available to offset future taxable income in addition to the net operating loss balances presented above. The tax benefit and the credit to additional paid-in capital related to these payments will be recorded at a future date when the deduction reduces current taxes payable.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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