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Operating Information by Segment and Geographic Area - Additional Operating Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Segment reporting information          
Investments $ 607   $ 607   $ 886
Energy & Chemicals          
Segment reporting information          
Accounts Receivable, Past Due 108   108    
Reportable segments | Energy & Chemicals | Forecast revisions for estimated cost growth for a fixed-price, gas-fired power plant project          
Segment reporting information          
Change in Forecast Estimate, Increase (Decrease) in Project Cost       $ 67  
Change In Forecast Estimate Increase Decrease In Project Cost Per Diluted Share       $ 0.47  
Reportable segments | Mining & Industrial | Nu Scale Power          
Segment reporting information          
Research and development expense 14 $ 18 48 $ 65  
Reportable segments | Mining & Industrial | Nu Scale Power | Cost-sharing agreement, research and development activities | U.S. Department of Energy | Total cost of revenue          
Segment reporting information          
Qualified expenses reimbursed 16 15 43 42  
Reportable segments | Mining & Industrial | Forecast revisions for estimated cost growth for a fixed-price, gas-fired power plant project          
Segment reporting information          
Change in Forecast Estimate, Increase (Decrease) in Project Cost   $ 125 $ 135    
Change In Forecast Estimate Increase Decrease In Project Cost Per Diluted Share   $ 0.68 $ 0.96    
Reportable segments | Mining & Industrial | Cost growth [Member]          
Segment reporting information          
Change in Forecast Estimate, Increase (Decrease) in Project Cost   $ 35   $ 177  
Change In Forecast Estimate Increase Decrease In Project Cost Per Diluted Share   $ 0.19   $ 0.96  
Reportable segments | Mining & Industrial | Late engineering change          
Segment reporting information          
Change in Forecast Estimate, Increase (Decrease) in Project Cost $ 55   $ 55    
Change In Forecast Estimate Increase Decrease In Project Cost Per Diluted Share $ 0.39   $ 0.30    
Reportable segments | Government | Late engineering change          
Segment reporting information          
Change in Forecast Estimate, Increase (Decrease) in Project Cost $ 20   $ 253    
Change In Forecast Estimate Increase Decrease In Project Cost Per Diluted Share $ 0.14   $ 1.80    
United States | Energy & Chemicals          
Segment reporting information          
Change in cost and schedule impacts, Increase (Decrease) in Project Cost $ 87 $ 46 $ 87 $ 113  
Change In Cost and Schedule Impacts Increase Decrease In Project Cost Per Diluted Share $ 0.50 $ 0.30 $ 0.50 $ 0.77  
United States | Energy & Chemicals | Forecast Revisions For Estimated Cost Growth On An Offshore Project          
Segment reporting information          
Pre-Tax Charges , Increase (Decrease) in Project Cost     $ 240    
Pre Tax Charges Increase Decrease In Project Cost Per Diluted Share     $ 1.40    
United States | Energy & Chemicals | Award Estimation Costs          
Segment reporting information          
Change in cost and schedule impacts, Increase (Decrease) in Project Cost $ 26   $ 26    
Change In Cost and Schedule Impacts Increase Decrease In Project Cost Per Diluted Share     $ 0.15    
United States | Energy & Chemicals | Close-out matters          
Segment reporting information          
Pre-Tax Charges , Increase (Decrease) in Project Cost     $ 31    
Pre Tax Charges Increase Decrease In Project Cost Per Diluted Share     $ 0.22