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Debt - Schedule of Line of Credit Facilities (Details) - Vistra Operations Company LLC - USD ($) $ in Thousands | Dec. 20, 2023 | Dec. 30, 2022 | Dec. 31, 2023 | Dec. 19, 2023 | Oct. 31, 2023 | Oct. 31, 2022 | Jul. 18, 2022 | Jun. 30, 2022 | May 31, 2022 | Apr. 29, 2022 | Feb. 28, 2022
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Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  | $ 7,250,000 |  |  |  |  |  |  |  |
Cash Borrowings |  |  | 2,500,000 |  |  |  |  |  |  |  |
Letters of Credit Outstanding |  |  | 1,962,000 |  |  |  |  |  |  |  |
Available Capacity |  |  | 2,314,000 |  |  |  |  |  |  |  |
Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  | 5,675,000 |  |  |  |  |  |  |  |
Cash Borrowings |  |  | 2,500,000 |  |  |  |  |  |  |  |
Letters of Credit Outstanding |  |  | 1,962,000 |  |  |  |  |  |  |  |
Available Capacity |  |  | 1,213,000 |  |  |  |  |  |  |  |
Senior Secured Extended Revolving Credit Facility | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  | 3,175,000 |  |  |  | $ 725,000 |  |  | $ 2,800,000 |
Cash Borrowings |  |  | 0 |  |  |  |  |  |  |  |
Letters of Credit Outstanding |  |  | 1,962,000 |  |  |  |  |  |  |  |
Available Capacity |  |  | 1,213,000 |  |  |  |  |  |  |  |
Line of credit facility, increase (decrease), net |  | $ 350,000 |  |  |  |  |  |  |  |  |
Senior Secured Term Loan B-3 Facility | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Facility Limit | $ 2,500,000 |  |  | $ 2,493,000 |  |  |  |  |  |  |
Cash Borrowings |  |  | 2,500,000 |  |  |  |  |  |  |  |
Letters of Credit Outstanding |  |  | 0 |  |  |  |  |  |  |  |
Available Capacity |  |  | 0 |  |  |  |  |  |  |  |
Debt Instrument, periodic payment | $ 6,250 |  |  |  |  |  |  |  |  |  |
Senior Secured Commodity-Linked Revolving Credit Facility | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Facility Limit |  |  |  |  | $ 1,575,000 | $ 1,350,000 |  | $ 2,250,000 | $ 2,000,000 |  | $ 1,000,000
Cash Borrowings |  |  | 0 |  |  |  |  |  |  |  |
Letters of Credit Outstanding |  |  | 0 |  |  |  |  |  |  |  |
Available Capacity |  |  | 1,101,000 |  |  |  |  |  |  |  |
Line of credit facility, borrowing base capacity limit |  |  | $ 1,101,000 |  |  |  |  |  |  |  |

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