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Cover Page - USD ($)
 12 Months Ended
Dec. 28, 2019
Feb. 21, 2020
Jun. 29, 2019
Cover page.      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 28, 2019    
Document Transition Report false    
Entity File Number 001-33486    
Entity Registrant Name Infinera Corp    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 77-0560433    
Entity Address, Address Line One 140 Caspian Court    
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 572-5200    
Title of 12(b) Security Common shares, par value $0.001 per share    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 372,288,790
Entity Common Stock, Shares Outstanding   183,026,317  
Documents Incorporated by Reference
Portions of the registrant’s definitive proxy statement relating to its 2020 Annual Meeting of Stockholders (the “2020 Proxy Statement”) are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. The 2020 Proxy Statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.

    
Entity Central Index Key 0001138639    
Current Fiscal Year End Date --12-28    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false    
Trading Symbol INFN