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Business Segment Information Schedule of Changes in Estimates (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Mar. 31, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Jun. 30, 2016
Dec. 31, 2015
Change in Accounting Estimate [Line Items]              
Reserve for estimated losses on uncompleted contracts $ 53     $ 53     $ 60
Changes in estimates at completion       12 $ 48    
EPC Ammonia Project in US [Member]              
Change in Accounting Estimate [Line Items]              
Reserve for estimated losses on uncompleted contracts 6     6     4
Power Projects [Member]              
Change in Accounting Estimate [Line Items]              
Reserve for estimated losses on uncompleted contracts 35     35     $ 47
Contract value $ 572     $ 572      
Percent complete on project 85.00%     85.00%      
Other EPC Ammonia Project in US [Member]              
Change in Accounting Estimate [Line Items]              
Percent complete on project 52.00%     52.00%      
Unfavorable [Member] | EPC Ammonia Project in US [Member]              
Change in Accounting Estimate [Line Items]              
Changes in estimates at completion $ 40   $ 12 $ 110 13    
Unfavorable [Member] | Power Projects [Member]              
Change in Accounting Estimate [Line Items]              
Changes in estimates at completion 86     112      
Unfavorable [Member] | Other EPC Ammonia Project in US [Member]              
Change in Accounting Estimate [Line Items]              
Changes in estimates at completion 7     7      
Favorable [Member] | Legacy Project in Canada [Member]              
Change in Accounting Estimate [Line Items]              
Changes in estimates at completion 9     9      
Favorable [Member] | LNG Project in Africa [Member]              
Change in Accounting Estimate [Line Items]              
Changes in estimates at completion $ 3     $ 59      
Favorable [Member] | Canadian Pipe Fabrication And Module Assembly Projects [Member]              
Change in Accounting Estimate [Line Items]              
Changes in estimates at completion     $ 4   $ 21    
Favorable [Member] | Sodium Dichromate Litigation [Member]              
Change in Accounting Estimate [Line Items]              
Contract termination claims, US Federal Government           $ 33  
Favorable [Member] | Road Construction Project [Member]              
Change in Accounting Estimate [Line Items]              
Changes in estimates at completion   $ 15