Acquisitions - Purchase Price (Details) - USD ($) $ in Millions	Mar. 01, 2024	Dec. 31, 2024
Vistra Vision
Business Acquisition [Line Items]
Fair value of noncontrolling interest in Energy Harbor	$ 749
Subsidiary, ownership percentage, noncontrolling owner		15.00%
Energy Harbor
Business Acquisition [Line Items]
Cash consideration	3,100
15% of the fair value of net assets contributed to Vistra Vision by Vistra	1,496
Total purchase price	4,596
Fair value of noncontrolling interest in Energy Harbor	811
Acquisition date fair value of Energy Harbor	$ 5,407
Energy Harbor \| Vistra Vision
Business Acquisition [Line Items]
Subsidiary, ownership percentage, noncontrolling owner	15.00%
Energy Harbor \| Vistra Corp. \| Vistra Vision
Business Acquisition [Line Items]
Subsidiary, ownership percentage, noncontrolling owner	15.00%

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.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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