Document and Entity Information	9 Months Ended
	Dec. 31, 2011	Feb. 03, 2012
Document and Entity Information
Entity Registrant Name	ACXIOM CORP
Entity Central Index Key	0000733269
Document Type	10-Q
Document Period End Date	Dec. 31, 2011
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		78,188,034
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3