XML 66 R50.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Summary of Significant Accounting Policies - Schedule of Jointly Owned Utility Plants (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Gross | $ 16,110.4 |  | $ 15,131.3 |
Accumulated Depreciation | 4,809.4 |  | 4,584.5 |
Net property, plant and equipment | $ 11,301.0 |  | $ 10,546.8 |
McClain Plant [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Jointly Owned Utility Plant, Proportionate Ownership Share | 77.00% | [1] | 77.00% | [2]
Property, Plant and Equipment, Gross | $ 265.4 | [1] | $ 261.9 | [2]
Accumulated Depreciation | 129.2 | [1] | 119.4 | [2]
Net property, plant and equipment | $ 136.2 | [1] | $ 142.5 | [2]
Redbud Plant [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Jointly Owned Utility Plant, Proportionate Ownership Share | 51.00% | [1],[3] | 51.00% | [2],[4]
Property, Plant and Equipment, Gross | $ 548.9 | [1],[3] | $ 542.1 | [2],[4]
Accumulated Depreciation | 245.5 | [1],[3] | 225.2 | [2],[4]
Net property, plant and equipment | 303.4 | [1],[3] | 316.9 | [2],[4]
OGE Energy [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Gross | 6.1 |  | 6.1 |
Accumulated Depreciation | 0.0 |  | 0.0 |
Net property, plant and equipment | 6.1 |  | 6.1 |
OG&E [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Gross | 16,104.3 |  | 15,125.2 |
Accumulated Depreciation | 4,809.4 |  | 4,584.5 |
Net property, plant and equipment | 11,294.9 |  | 10,540.7 |
OG&E [Member] | Total Property Plant and Equipment [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Gross | 16,104.3 |  | 15,125.2 |
Accumulated Depreciation | 4,809.4 |  | 4,584.5 |
Net property, plant and equipment | 11,294.9 |  | 10,540.7 |
OG&E [Member] | Electric Transmission and Distribution [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Gross | 6,290.1 |  | 5,781.3 |
Accumulated Depreciation | 1,564.3 |  | 1,527.1 |
Net property, plant and equipment | 4,725.8 |  | 4,254.2 |
OG&E [Member] | Electric Generation Equipment [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Gross | 5,295.9 | [5] | 5,188.1 | [6]
Accumulated Depreciation | 2,081.0 | [5] | 1,982.7 | [6]
Net property, plant and equipment | 3,214.9 | [5] | 3,205.4 | [6]
OG&E [Member] | Electric Transmission [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Gross | 3,306.7 | [7] | 3,180.5 | [8]
Accumulated Depreciation | 707.6 | [7] | 667.9 | [8]
Net property, plant and equipment | 2,599.1 | [7] | 2,512.6 | [8]
OG&E [Member] | Finite-Lived Intangible Assets, Major Class Name [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Gross | 568.5 |  | 384.0 |
Accumulated Depreciation | 219.8 |  | 193.6 |
Net property, plant and equipment | 348.7 |  | 190.4 |
OG&E [Member] | Property, Plant and Equipment, Other Types [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Gross | 643.1 |  | 591.3 |
Accumulated Depreciation | 236.7 |  | 213.2 |
Net property, plant and equipment | $ 406.4 |  | $ 378.1 |
[1] | Construction work in progress was $0.3 million and $2.0 million for the McClain and Redbud Plants, respectively.
[2] | Construction work in progress was $0.7 million and $1.5 million for the McClain and Redbud Plants, respectively.
[3] | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $83.8 million.
[4] | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $78.3 million.
[5] | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $83.8 million.
[6] | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $78.3 million.
[7] | This amount includes a plant acquisition adjustment of $3.3 million and accumulated amortization of $1.1 million.
[8] | This amount includes a plant acquisition adjustment of $3.3 million and accumulated amortization of $1.0 million.

X
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-1 + Details
Name: | us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The proportionate share of interest (percent) in a jointly owned utility plant. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479960/980-360-S99-1 + Details
Name: | us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-1 + Details
Name: | us-gaap_PropertyPlantAndEquipmentGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 360 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480842/942-360-50-1 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_JointlyOwnedUtilityPlantAxis=oge_McclainPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_JointlyOwnedUtilityPlantAxis=oge_RedbudPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=oge_OgeEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=oge_OgAndEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=oge_TotalPropertyPlantAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ElectricDistributionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ElectricGenerationEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ElectricTransmissionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=oge_FiniteLivedIntangibleAssetsMajorClassNameMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_PropertyPlantAndEquipmentOtherTypesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |