| Cover Page | Sep. 11, 2019 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 11, 2019 |
| Entity Registrant Name | Baker Hughes a GE Co |
| Entity Central Index Key | 0001701605 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 1-38143 |
| 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 |
| City Area Code | 713 |
| Local Phone Number | 439-8600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Title of 12(b) Security | Class A Common Stock, par value $0.0001 per share |
| Trading Symbol | BHGE |
| Security Exchange Name | NYSE |
| Baker Hughes, a GE company, LLC | |
| Document Information [Line Items] | |
| Entity Registrant Name | BAKER HUGHES a GE Co LLC |
| Entity Central Index Key | 0000808362 |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 1-09397 |
| Entity Tax Identification Number | 76-0207995 |
| Title of 12(b) Security | 5.125% Senior Notes due 2040 |
| Security Exchange Name | NYSE |
| No Trading Symbol Flag | true |
