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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2016
Feb. 17, 2017
Jul. 03, 2016
Document And Entity Information [Abstract]      
Entity Registrant Name ON Semiconductor Corporation    
Entity Central Index Key 0001097864    
Current Fiscal Year End --12-31    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2016    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2016    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   419,610,858  
Entity Well-known Seasoned Issuer Yes    
Entity Public Float     $ 3,601,740,218
Entity Current Reporting Status Yes    
Entity Voluntary Filers No