Document and Entity Information	9 Months Ended
	Jan. 25, 2013	Feb. 19, 2013
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jan. 25, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Trading Symbol	NTAP
Entity Registrant Name	NetApp, Inc.
Entity Central Index Key	0001002047
Current Fiscal Year End Date	--04-26
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		360,407,151