Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2020	Mar. 20, 2020	Jul. 31, 2019
Document And Entity Information
Document Type	10-K
Document Period End Date	Jan. 31, 2020
Entity Registrant Name	KLX Energy Services Holdings, Inc.
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		24,742,626
Entity Public Float			$ 331.4
Current Fiscal Year End Date	--01-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Central Index Key	0001738827
Amendment Flag	false