| Cover | Nov. 13, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 13, 2024 |
| Entity File Number | 001-38579 |
| Entity Registrant Name | BrightView Holdings, Inc. |
| Entity Central Index Key | 0001734713 |
| Entity Tax Identification Number | 46-4190788 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 980 Jolly Road |
| Entity Address, City or Town | Blue Bell |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19422 |
| City Area Code | 844 |
| Local Phone Number | 235-7778 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, $0.01 par value |
| Trading Symbol | BV |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
