| Cover Page | Jun. 22, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jun. 21, 2022 |
| Entity Registrant Name | KLX ENERGY SERVICES HOLDINGS, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-38609 |
| Entity Tax Identification Number | 36-4904146 |
| Entity Address, Address Line One | 3040 Post Oak Boulevard |
| Entity Address, Address Line Two | 15th Floor |
| Entity Address, City or Town | Houston |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 77056 |
| City Area Code | 832 |
| Local Phone Number | 844-1015 |
| 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 | KLXE |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001738827 |
