Document and Entity Information - USD ($)
12 Months Ended
Sep. 27, 2019
Nov. 12, 2019
Mar. 31, 2017
Document and Entity Information [Abstract]      
Document Transition Report false    
Document Annual Report true    
Trading Symbol SWKS    
Title of 12(b) Security Common Stock, par value $0.25 per share    
Local Phone Number 376-3000    
Entity Address, Address Line One 20 Sylvan Road,    
Entity Incorporation, State or Country Code DE    
Entity Registrant Name Skyworks Solutions, Inc.    
Entity Interactive Data Current Yes    
Entity Shell Company false    
Entity Central Index Key 0000004127    
Document Type 10-K    
Document Period End Date Sep. 27, 2019    
Entity File Number 001-05560    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --09-27    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float $ 14,200,000,000   $ 18,194,560,180
Entity Common Stock, Shares Outstanding   170,375,324  
Entity Tax Identification Number 04-2302115    
Entity Address, City or Town Woburn    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 01801    
City Area Code (781)    
Security Exchange Name NASDAQ    
Entity Small Business false    
Entity Emerging Growth Company false