Document and Entity Information
| Document and Entity Information Document | Dec. 17, 2021 |
| Entity Information [Line Items] | |
| Entity Central Index Key | 0001021635 |
| Document Type | 8-K |
| City Area Code | 405 |
| Local Phone Number | 553-3000 |
| Entity Emerging Growth Company | false |
| Title of 12(b) Security | Common Stock |
| Written Communications | false |
| Document Period End Date | Dec. 17, 2021 |
| Entity Registrant Name | OGE ENERGY CORP. |
| Entity Incorporation, State or Country Code | OK |
| Entity File Number | 1-12579 |
| Entity Tax Identification Number | 73-1481638 |
| Entity Address, Address Line One | 321 North Harvey |
| Entity Address, Address Line Two | P.O. Box 321 |
| Entity Address, City or Town | Oklahoma City |
| Entity Address, State or Province | OK |
| Entity Address, Postal Zip Code | 73101-0321 |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Trading Symbol | OGE |
| Security Exchange Name | NYSE |
| Amendment Flag | false |
| OG&E | |
| Entity Information [Line Items] | |
| Entity Central Index Key | 0000074145 |
| Entity Registrant Name | OKLAHOMA GAS AND ELECTRIC COMPANY |
| Entity File Number | 1-1097 |
| Entity Tax Identification Number | 73-0382390 |