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Operating Information by Segment and Geographic Area - Other Segment Profit (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) | $ 147 | $ 209 | $ (273)
Fluor Corporation | NuScale | Disposal Group, Not Discontinued Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Entity's interest in partnership or joint venture (percent) | 55.00% |  |
Reportable segments | Continuing Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) | $ 537 | 427 | 415
Reportable segments | Other | Continuing Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) | (228) | (27) | (31)
Reportable segments | Other | Continuing Operations | NuScale |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) | (106) | (73) | (69)
Reportable segments | Other | Continuing Operations | Stork |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) | (55) | 45 | 32
Reportable segments | Other | Continuing Operations | AMECO |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income (Loss) | $ (67) | $ 1 | $ 6

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