Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2018	Aug. 06, 2018
Document and Entity Information
Entity Registrant Name	ACXIOM CORP
Entity Central Index Key	0000733269
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		77,354,458
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1