Document and Entity Information Document - USD ($)
12 Months Ended
Sep. 27, 2019
Jan. 20, 2020
Mar. 31, 2017
Cover page [Abstract]      
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Title of 12(b) Security Common Stock, par value $0.25 per share    
Entity Address, Address Line One 20 Sylvan Road,    
Entity Incorporation, State or Country Code DE    
Document Transition Report false    
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Sep. 27, 2019    
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)    
Local Phone Number 376-3000    
Trading Symbol SWKS    
Security Exchange Name NASDAQ    
Entity File Number 001-05560    
Entity Registrant Name Skyworks Solutions, Inc.    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Shell Company false    
Entity Public Float $ 14,200,000,000   $ 18,194,560,180
Entity Common Stock, Shares Outstanding   170,155,181  
Entity Central Index Key 0000004127    
Amendment Flag true    
Amendment Description No. 1    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --09-27    
Entity Small Business false    
Entity Emerging Growth Company false