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Income Taxes - Summary of Tax Credit Carryforwards (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Income Taxes [Line Items] |  |
Tax Credit Carryforward, Deferred Tax Asset | $ 0.0 | $ 208.4
State tax credits | (221.2) | (221.2)
Og and E [Member] |  |
Income Taxes [Line Items] |  |
Tax Credit Carryforward, Deferred Tax Asset | 0.0 | 209.8
State tax credits | (208.5) | $ (205.9)
Oklahoma investment tax credits [Member] |  |
Income Taxes [Line Items] |  |
Tax Credit Carryforward, Amount | 242.8 |
State tax credits | 191.8 |
Oklahoma investment tax credits [Member] | Og and E [Member] |  |
Income Taxes [Line Items] |  |
Tax Credit Carryforward, Amount | 226.7 |
State tax credits | 179.1 |
Oklahoma capital investment board credits [Member] |  |
Income Taxes [Line Items] |  |
Tax Credit Carryforward, Amount | 12.8 |
State tax credits | 12.8 |
Oklahoma capital investment board credits [Member] | Og and E [Member] |  |
Income Taxes [Line Items] |  |
Tax Credit Carryforward, Amount | 12.8 |
State tax credits | 12.8 |
Oklahoma zero emission tax credits [Member] |  |
Income Taxes [Line Items] |  |
Tax Credit Carryforward, Amount | 22.6 |
State tax credits | 16.6 |
Oklahoma zero emission tax credits [Member] | Og and E [Member] |  |
Income Taxes [Line Items] |  |
Tax Credit Carryforward, Amount | 22.6 |
State tax credits | $ 16.6 |

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- Definition Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 + Details
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + 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 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
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