XML 1063 R38.htm IDEA: XBRL DOCUMENT
v3.20.4

Income Taxes (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Income Taxes [Abstract] |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] | The following table presents the components of income tax expense (benefit).
| OGE Energy |  | OG&E
Year Ended December 31 (In millions) | 2020 | 2019 | 2018 |  | 2020 | 2019 | 2018
Provision (benefit) for current income taxes: |  |  |  |  |  |  |
Federal | $ | 8.4 |  | $ | (6.4) |  | $ | (1.9) |  |  | $ | (3.8) |  | $ | (7.9) |  | $ | (12.4) |
State | 0.5 |  | 5.1 |  | (4.4) |  |  | (0.6) |  | 4.1 |  | (4.1) |
Total provision (benefit) for current income taxes | 8.9 |  | (1.3) |  | (6.3) |  |  | (4.4) |  | (3.8) |  | (16.5) |
Provision (benefit) for deferred income taxes, net: |  |  |  |  |  |  |
Federal | (105.2) |  | 48.5 |  | 74.7 |  |  | 45.7 |  | 37.7 |  | 53.7 |
State | (31.1) |  | (17.4) |  | 3.7 |  |  | (6.6) |  | (13.8) |  | 2.7 |
Total provision (benefit) for deferred income taxes, net | (136.3) |  | 31.1 |  | 78.4 |  |  | 39.1 |  | 23.9 |  | 56.4 |
Deferred federal investment tax credits, net | — |  | — |  | 0.1 |  |  | — |  | — |  | 0.1 |
Total income tax expense (benefit) | $ | (127.4) |  | $ | 29.8 |  | $ | 72.2 |  |  | $ | 34.7 |  | $ | 20.1 |  | $ | 40.0 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | The following table presents a reconciliation of the statutory tax rates to the effective income tax rate.
| OGE Energy |  | OG&E
Year Ended December 31 | 2020 | 2019 | 2018 |  | 2020 | 2019 | 2018
Statutory federal tax rate | 21.0 | % | 21.0 | % | 21.0 | % |  | 21.0 | % | 21.0 | % | 21.0 | %
Impairment of OGE Energy's investment in Enable (A) | 31.6 |  | — |  | — |  |  | — |  | — |  | — |
Remeasurement of state deferred tax liabilities | 0.9 |  | (0.8) |  | (0.4) |  |  | — |  | — |  | — |
Executive compensation limitation | 0.2 |  | 0.2 |  | 0.2 |  |  | — |  | — |  | — |
Other | 0.1 |  | (0.7) |  | 0.4 |  |  | 0.1 |  | (0.6) |  | (0.1) |
Federal renewable energy credit (B) | (5.0) |  | (6.0) |  | (5.1) |  |  | (5.4) |  | (7.6) |  | (6.9) |
Amortization of net unfunded deferred taxes | (4.4) |  | (4.5) |  | (2.1) |  |  | (4.8) |  | (5.6) |  | (2.9) |
State income taxes, net of federal income tax benefit | (1.4) |  | (1.2) |  | 0.4 |  |  | (1.6) |  | (1.8) |  | (0.2) |
Stock-based compensation | (0.3) |  | (1.2) |  | — |  |  | — |  | — |  | — |
401(k) dividends | (0.4) |  | (0.4) |  | (0.3) |  |  | — |  | — |  | — |
Federal deferred tax revaluation | — |  | — |  | 0.4 |  |  | — |  | — |  | — |
Effective income tax rate | 42.3 | % | 6.4 | % | 14.5 | % |  | 9.3 | % | 5.4 | % | 10.9 | %
(A)As further discussed in Note 5, OGE Energy recorded a $780.0 million impairment on its investment in Enable in March 2020, which resulted in a tax benefit being recorded that caused a significant variance to the effective tax rate as compared to the prior year. This variance has been presented in the table as a single line item in order to facilitate comparability of other components of the effective tax rate. (B)Represents credits primarily associated with the production from OG&E's wind farms.
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] | The following table presents the components of Deferred Income Taxes at December 31, 2020 and 2019.
| OGE Energy |  | OG&E
December 31 (In millions) | 2020 | 2019 |  | 2020 | 2019
Deferred income tax liabilities, net: |  |  |  |  |
Accelerated depreciation and other property related differences | $ | 1,721.2 |  | $ | 1,656.8 |  |  | $ | 1,721.2 |  | $ | 1,656.8 |
Investment in Enable | 302.6 |  | 478.2 |  |  | — |  | — |
Regulatory assets | 52.3 |  | 28.4 |  |  | 52.3 |  | 28.4 |
Pension Plan | 3.9 |  | 4.1 |  |  | 27.4 |  | 24.5 |
Bond redemption-unamortized costs | 2.0 |  | 2.2 |  |  | 2.0 |  | 2.2 |
Derivative instruments | 1.7 |  | 1.6 |  |  | — |  | — |
Federal tax credits | (236.6) |  | (238.0) |  |  | (236.6) |  | (238.0) |
Income taxes recoverable from customers, net | (221.8) |  | (229.9) |  |  | (221.8) |  | (229.9) |
State tax credits | (204.4) |  | (185.8) |  |  | (189.0) |  | (170.8) |
Regulatory liabilities | (81.0) |  | (68.1) |  |  | (81.0) |  | (68.1) |
Postretirement medical and life insurance benefits | (22.4) |  | (23.3) |  |  | (15.3) |  | (16.0) |
Asset retirement obligations | (20.3) |  | (19.2) |  |  | (20.3) |  | (19.2) |
Net operating losses | (12.0) |  | (16.6) |  |  | (1.4) |  | (5.7) |
Accrued liabilities | (9.6) |  | (10.7) |  |  | (5.2) |  | (4.3) |
Deferred federal investment tax credits | (2.7) |  | (1.8) |  |  | (2.7) |  | (1.8) |
Accrued vacation | (2.2) |  | (2.1) |  |  | (1.6) |  | (1.6) |
Other | (1.4) |  | 0.4 |  |  | (6.5) |  | (4.7) |
Uncollectible accounts | (0.7) |  | (0.4) |  |  | (0.7) |  | (0.4) |
Total deferred income tax liabilities, net | $ | 1,268.6 |  | $ | 1,375.8 |  |  | $ | 1,020.8 |  | $ | 951.4 |
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] | The following table presents a reconciliation of the Registrants' total gross unrecognized tax benefits as of the years ended December 31, 2020, 2019 and 2018.
(In millions) | 2020 | 2019 | 2018
Balance at January 1 | $ | 20.7 |  | $ | 20.7 |  | $ | 20.7 |
Tax positions related to current year: |  |  |
Additions | 1.2 |  | — |  | — |
Balance at December 31 | $ | 21.9 |  | $ | 20.7 |  | $ | 20.7 |
Summary of Tax Credit Carryforwards [Table Text Block] | The following table presents a summary of these carry forwards.
| OGE Energy |  | OG&E |
(In millions) | Carry Forward Amount | Deferred Tax Asset |  | Carry Forward Amount | Deferred Tax Asset | Earliest Expiration Date
State operating loss | $ | 268.0 |  | $ | 12.0 |  |  | $ | 21.5 |  | $ | 1.4 |  | 2030
Federal tax credits | $ | 236.6 |  | $ | 236.6 |  |  | $ | 236.6 |  | $ | 236.6 |  | 2032
State tax credits: |  |  |  |  |  |
Oklahoma investment tax credits | $ | 205.6 |  | $ | 162.3 |  |  | $ | 186.1 |  | $ | 147.0 |  | N/A
Oklahoma capital investment board credits | $ | 12.7 |  | $ | 12.7 |  |  | $ | 12.7 |  | $ | 12.7 |  | N/A
Oklahoma zero emission tax credits | $ | 37.2 |  | $ | 29.3 |  |  | $ | 37.2 |  | $ | 29.3 |  | 2021
Louisiana inventory credits | $ | 0.2 |  | $ | 0.1 |  |  | $ | — |  | $ | — |  | 2021
N/A - not applicable

X
- Definition Income Taxes [Abstract] + References No definition available. + Details
Name: | oge_IncomeTaxesAbstract
Namespace Prefix: | oge_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
Name: | us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
Name: | us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
Name: | us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the change in unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 55 -Paragraph 217 -URI http://asc.fasb.org/extlink&oid=121610041&loc=d3e36027-109320 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
Name: | us-gaap_ScheduleOfUnrecognizedTaxBenefitsRollForwardTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of tax credit carryforwards available to reduce future taxable income, including amounts, expiration dates, limitations on use and the related deferred tax assets and valuation allowances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
Name: | us-gaap_SummaryOfTaxCreditCarryforwardsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration