Operating Information by Segment and Geographic Area - Narrative (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($) project $ / shares	Dec. 31, 2019 USD ($) project $ / shares
Segment Reporting Information [Line Items]
Charges from write-off of embedded foreign currency derivatives			$ 26,000
Charges from write-off of embedded foreign currency derivatives (in dollars per share) | $ / shares			$ 0.19
Capital contributions by NCI	$ 201,847	$ 110,051	$ 64,646
Energy Solutions
Segment Reporting Information [Line Items]
Recognition of reserves for expected credit losses		$ 60,000
Change in cost and schedule impacts			$ 87,000
Change in cost and schedule impacts (in dollars per share) | $ / shares			$ 0.62
Number of projects | project			2
Energy Solutions | Write-off of pre-contract costs
Segment Reporting Information [Line Items]
Charges from write-off of pre-contract costs			$ 26,000
Charges from write-off of pre-contract costs (in dollars per share) | $ / shares			$ 190,000
Energy Solutions | Close-out matters
Segment Reporting Information [Line Items]
Pre-tax charges associated with forecast revisions			$ 31,000
Pre-tax charges adversely affecting earnings before taxes (in dollars per share) | $ / shares			$ 0.22
Energy Solutions | North America | Forecast revisions for estimated cost Growth on an offshore project
Segment Reporting Information [Line Items]
Pre-tax charges associated with forecast revisions			$ 260,000
Pre-tax charges adversely affecting earnings before taxes (in dollars per share) | $ / shares			$ 1.85
Energy Solutions | Single customer | Consolidated revenue | Customer concentration
Segment Reporting Information [Line Items]
Concentration risk (as a percentage)	15.00%	13.00%	13.00%
Urban Solutions
Segment Reporting Information [Line Items]
Gains related to favorable dispute resolution			$ (31,000)
Gains related to favorable dispute resolution (in dollars per share) | $ / shares			$ 0.16
Mission Solutions
Segment Reporting Information [Line Items]
Number of projects | project		3
Mission Solutions | Settlement of client disputes as well as cost growth related to close-out matters
Segment Reporting Information [Line Items]
Effect of forecast revision on estimated project cost		$ 135,000
Effect of forecast revision on estimated project cost (in dollars per share) | $ / shares		$ 0.96
Mission Solutions | Late engineering changes
Segment Reporting Information [Line Items]
Effect of forecast revision on estimated project cost		$ 133,000
Effect of forecast revision on estimated project cost (in dollars per share) | $ / shares		$ 0.95
Other | Warren project
Segment Reporting Information [Line Items]
Effect of forecast revision on estimated project cost			$ 59,000
Effect of forecast revision on estimated project cost (in dollars per share) | $ / shares			$ 0.42
Other | Radford project
Segment Reporting Information [Line Items]
Effect of forecast revision on estimated project cost			$ 83,000
Effect of forecast revision on estimated project cost (in dollars per share) | $ / shares			$ 0.59
Other | JGC Holdings Corporation, GS Energy And IHI Corporation | Reportable segments | NuScale
Segment Reporting Information [Line Items]
Capital contributions by NCI	$ 193,000	$ 9,000	$ 49,000
Urban Solutions
Segment Reporting Information [Line Items]
Effect of forecast revision on estimated project cost	$ 138,000
Effect of forecast revision on estimated project cost (in dollars per share) | $ / shares	$ 0.72
Government Segment | Consolidated revenue | Customer concentration
Segment Reporting Information [Line Items]
Concentration risk (as a percentage)	24.00%	20.00%	17.00%