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Borrowings - Additional Information (Details) - USD ($)
12 Months Ended
Jul. 03, 2017
Dec. 31, 2017
Jun. 30, 2018
Dec. 11, 2017
Line of Credit Facility [Line Items]        
Estimated fair value of debt   $ 8,466,000,000 $ 7,061,000,000  
2017 Credit Agreement | Revolving credit facility        
Line of Credit Facility [Line Items]        
Debt instrument, term 5 years      
Line of credit facility, maximum borrowing capacity $ 3,000,000,000      
Baker Hughes Co-Obligor, Inc. | BHGE LLC        
Line of Credit Facility [Line Items]        
Ownership percentage   100.00%    
Senior Notes | Private Placement | BHGE LLC        
Line of Credit Facility [Line Items]        
Debt instrument, face       $ 3,950,000,000