Document and Entity Information (USD $)	12 Months Ended
	Dec. 28, 2013	Jan. 21, 2014	Jun. 28, 2013
Document and Entity Information
Entity Registrant Name	SILICON LABORATORIES INC
Entity Central Index Key	0001038074
Document Type	10-K
Document Period End Date	Dec. 28, 2013
Amendment Flag	false
Current Fiscal Year End Date	--12-28
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 1,639,157,249
Entity Common Stock, Shares Outstanding		42,826,583
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY