Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2016
Jan. 23, 2017
Jul. 01, 2016
Document and Entity Information      
Entity Registrant Name SILICON LABORATORIES INC    
Entity Central Index Key 0001038074    
Document Type 10-K    
Document Period End Date Dec. 31, 2016    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 1,951,606,092
Entity Common Stock, Shares Outstanding   41,890,791  
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY