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Business Acquisition - Estimated fair value and average life (Details) - USD ($)
$ in Millions
12 Months Ended
Jul. 03, 2017
Dec. 31, 2017
Dec. 31, 2016
Business Acquisition [Line Items]      
Other intangible assets, net   $ 6,358 $ 2,449
GE Transaction Agreement      
Business Acquisition [Line Items]      
Other intangible assets, net $ 4,123    
Customer-related | GE Transaction Agreement      
Business Acquisition [Line Items]      
Finite-lived Intangible Assets Acquired $ 1,260    
Estimated Weighted Average Life (Years) 15 years    
Patents and technology | GE Transaction Agreement      
Business Acquisition [Line Items]      
Finite-lived Intangible Assets Acquired $ 550    
Estimated Weighted Average Life (Years) 10 years    
Patents and technology | GE Transaction Agreement      
Business Acquisition [Line Items]      
Finite-lived Intangible Assets Acquired $ 70    
Estimated Weighted Average Life (Years) 10 years    
Capitalized software | GE Transaction Agreement      
Business Acquisition [Line Items]      
Finite-lived Intangible Assets Acquired $ 90    
Favorable lease contracts | GE Transaction Agreement      
Business Acquisition [Line Items]      
Finite-lived Intangible Assets Acquired $ 8    
Estimated Weighted Average Life (Years) 10 years    
Trademarks - Baker Hughes | GE Transaction Agreement      
Business Acquisition [Line Items]      
Indefinite-lived Intangible Assets Acquired $ 2,100    
In-process research and development | GE Transaction Agreement      
Business Acquisition [Line Items]      
Indefinite-lived Intangible Assets Acquired $ 45    
Minimum      
Business Acquisition [Line Items]      
Estimated Weighted Average Life (Years)   1 year  
Minimum | Capitalized software | GE Transaction Agreement      
Business Acquisition [Line Items]      
Estimated Weighted Average Life (Years) 3 years    
Maximum      
Business Acquisition [Line Items]      
Estimated Weighted Average Life (Years)   30 years  
Maximum | Capitalized software | GE Transaction Agreement      
Business Acquisition [Line Items]      
Estimated Weighted Average Life (Years) 7 years