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Pension and Other Postretirement Employee Benefits (OPEB) Plans - Schedule of Allocation of Plan Assets (Details) - Pension costs | Dec. 31, 2023
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Expected return on plan assets (Vistra Plan) | Fixed income securities | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 50.00%
Expected return on plan assets (Vistra Plan) | Fixed income securities | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 70.00%
Expected return on plan assets (Vistra Plan) | Global equity securities | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 20.00%
Expected return on plan assets (Vistra Plan) | Global equity securities | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 28.00%
Expected return on plan assets (Vistra Plan) | Real estate | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 6.00%
Expected return on plan assets (Vistra Plan) | Real estate | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 10.00%
Expected return on plan assets (Vistra Plan) | Credit strategies | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 2.00%
Expected return on plan assets (Vistra Plan) | Credit strategies | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 6.00%
Expected return on plan assets (Vistra Plan) | Hedge funds | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 2.00%
Expected return on plan assets (Vistra Plan) | Hedge funds | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 6.00%
Expected return on plan assets (Dynegy Plan) | Fixed income securities | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 40.00%
Expected return on plan assets (Dynegy Plan) | Fixed income securities | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 50.00%
Expected return on plan assets (Dynegy Plan) | Global equity securities | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 28.00%
Expected return on plan assets (Dynegy Plan) | Global equity securities | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 38.00%
Expected return on plan assets (Dynegy Plan) | Real estate | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 7.00%
Expected return on plan assets (Dynegy Plan) | Real estate | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 15.00%
Expected return on plan assets (Dynegy Plan) | Credit strategies | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 4.00%
Expected return on plan assets (Dynegy Plan) | Credit strategies | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 8.00%
Expected return on plan assets (Dynegy Plan) | Hedge funds | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 4.00%
Expected return on plan assets (Dynegy Plan) | Hedge funds | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Target Allocation Ranges | 8.00%

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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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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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