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Segment Information - Power Segment (Details)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2015
USD ($)
Jul. 04, 2015
USD ($)
MW
Sep. 27, 2014
USD ($)
Dec. 31, 2016
USD ($)
segment
MW
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Mar. 29, 2014
MW
Segment Information              
Number of reportable segments | segment       6      
Gain on sale of assets           $ 5  
Interest income recorded for interest recognized on certain customer receivable balances       $ 15 $ 40 $ 14  
Electricity generating facility | Dominican Republic              
Segment Information              
Amount invested under equity method   $ 10          
Capacity of power facility (in megawatts) | MW   300          
Power | Electricity generating facility | Dominican Republic              
Segment Information              
Percentage of ownership interest accounted as equity method investment   29.90%   29.90%      
Amount invested under equity method   $ 10          
Capacity of power facility (in megawatts) | MW   300   300      
Power | Floating power generating facility | Dominican Republic              
Segment Information              
Capacity of power facility leased (in megawatts) | MW             72
Gain on sale of assets     $ 5        
Power | Accounts Receivable              
Segment Information              
Interest income recorded for interest recognized on certain customer receivable balances $ 31