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Retirement Plans and Postretirement Benefit Plans - Schedule of Capitalized Pension and Postretirement Cost (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Pension Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Capitalized portion of net periodic pension benefit cost | $ 0.0 | $ 0.6
Pension Plan [Member] | OG&E [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Capitalized portion of net periodic pension benefit cost | 0.6 | 0.5
Other Postretirement Benefits Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Capitalized portion of net periodic pension benefit cost | 0.0 | 0.0
Other Postretirement Benefits Plan [Member] | OG&E [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Capitalized portion of net periodic pension benefit cost | $ 0.0 | $ 0.0

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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- 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
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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Period Type: |