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Operating Information by Segment and Geographic Area - Other Segment Profit (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Operating income (Loss)	$ 463	$ 147	$ 209
Reportable segments
Segment Reporting Information [Line Items]
Operating income (Loss)	635	537	427
Reportable segments | Other
Segment Reporting Information [Line Items]
Operating income (Loss)	(78)	(228)	(27)
Reportable segments | Other | NuScale
Segment Reporting Information [Line Items]
Operating income (Loss)	(100)	(106)	(73)
Reportable segments | Other | Stork
Segment Reporting Information [Line Items]
Operating income (Loss)	23	(55)	45
Reportable segments | Other | AMECO
Segment Reporting Information [Line Items]
Operating income (Loss)	$ (1)	$ (67)	$ 1

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