| Cover | Feb. 10, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 10, 2021 |
| Entity Registrant Name | BLOOM ENERGY CORPORATION |
| Entity File Number | 001-38598 |
| Entity Tax Identification Number | 77-0565408 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Postal Zip Code | 95134 |
| Entity Address, State or Province | CA |
| Entity Address, City or Town | San Jose, |
| Entity Address, Address Line One | 4353 North First Street, |
| Local Phone Number | 543-1500 |
| City Area Code | 408 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, $0.0001 par value |
| Trading Symbol | BE |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001664703 |
