Document and Entity Information - USD ($)
$ in Billions
12 Months Ended
Sep. 28, 2018
Nov. 09, 2018
Mar. 30, 2018
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Sep. 28, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Entity Registrant Name MACOM Technology Solutions Holdings, Inc.    
Entity Central Index Key 0001493594    
Current Fiscal Year End Date --09-28    
Entity Well-known Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Share Outstanding   65,192,357  
Entity Public Float     $ 0.7