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Document And Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Feb. 11, 2022
Jun. 27, 2021
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2021    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Trading Symbol NTGR    
Entity Registrant Name NETGEAR, Inc.    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Central Index Key 0001122904    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
ICFR Auditor Attestation Flag true    
Smaller Reporting Company false    
Entity Shell Company false    
Entity Emerging Growth Company false    
Entity Tax Identification Number 77-0419172    
Entity File Number 000-50350    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 350 East Plumeria Drive    
Entity Address, City or Town San Jose    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 95134    
City Area Code (408)    
Local Phone Number 907-8000    
Security Exchange Name NASDAQ    
Title of 12(b) Security Common Stock, $0.001 par value    
Document Annual Report true    
Document Transition Report false    
Entity Interactive Data Current Yes    
Entity Common Stock, Shares Outstanding (In shares)   29,360,520  
Entity Public Float     $ 1,150
Auditor Name PricewaterhouseCoopers LLP    
Auditor Location San Jose, California    
Auditor Firm ID 238    
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Proxy Statement for the Registrant’s 2022 Annual Meeting of Stockholders are incorporated by reference in Part III of this Form 10-K.