Document and Entity Information - shares	6 Months Ended
	Oct. 25, 2019	Nov. 13, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 25, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Trading Symbol	NTAP
Entity Registrant Name	NetApp, Inc.
Entity Central Index Key	0001002047
Current Fiscal Year End Date	--04-24
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Small Business	false
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		228,226,206
Entity File Number	000-27130
Entity Tax Identification Number	77-0307520
Entity Address, Address Line One	1395 Crossman Avenue
Entity Address, City or Town	Sunnyvale
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94089
City Area Code	408
Local Phone Number	822-6000
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	DE
Entity Interactive Data Current	Yes
Security Exchange Name	NASDAQ
Title of 12(b) Security	Common Stock, $0.001 Par Value