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v3.21.2

Income Taxes (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Non-Current Regulatory Liabilities | $ 1,247.7 | $ 1,188.9
OG&E [Member] |  |
Non-Current Regulatory Liabilities | 1,247.7 | $ 1,188.9
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | 97.7 |
OGE Energy [Member] |  |
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ 6.6 |

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- Definition The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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