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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2021
Feb. 07, 2022
Jun. 30, 2021
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-38143    
Entity Registrant Name Baker Hughes Company    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 81-4403168    
Entity Address, Address Line One 17021 Aldine Westfield Road    
Entity Address, City or Town Houston,    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77073-5101    
City Area Code 713    
Local Phone Number 439-8600    
Title of 12(b) Security Class A Common Stock, $0.0001 Par Value per Share    
Trading Symbol BKR    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 15,782,188,948
Documents Incorporated by Reference Portions of Registrant's Definitive Proxy Statement for the 2022 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.    
Entity Central Index Key 0001701605    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Amendment Flag false    
Class A Common Stock      
Entity Information [Line Items]      
Entity Common Stock, Shares Outstanding   953,340,976  
Class B Common Stock      
Entity Information [Line Items]      
Entity Common Stock, Shares Outstanding   74,129,913