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Operating Information by Segment and Geographic Area - Other Segment Profit (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) | $ (378) | $ 463 | $ 147
Reportable segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) | (109) | 635 | 537
Reportable segments | Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) | $ 6 | (78) | (228)
Reportable segments | Other | NuScale |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) |  | (100) | (106)
Reportable segments | Other | Stork |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) |  | 23 | (55)
Reportable segments | Other | AMECO |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) |  | $ (1) | $ (67)

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