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Operating Information by Segment and Geographic Area - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Segment Reporting Information [Line Items]        
Revenue $ 3,103,085 $ 3,456,938 $ 9,278,017 $ 10,889,575
Capital contributions by NCI     201,511 82,109
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)     $ 0.72  
Urban Solutions | Intersegment Eliminations        
Segment Reporting Information [Line Items]        
Revenue $ 60,400 $ 60,600 $ 198,900 $ 199,700
Other | Reportable segments | Nu Scale Power | Nu Scale Power        
Segment Reporting Information [Line Items]        
Ownership interest percentage 80.00%   80.00%  
Other | Reportable segments | Nu Scale Power | JGC Holdings Corporation, GS Energy And IHI Corporation        
Segment Reporting Information [Line Items]        
Capital contributions by NCI     $ 193,000