v3.25.1
Cover Page - shares
3 Months Ended
Apr. 04, 2025
Apr. 30, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Apr. 04, 2025  
Document Transition Report false  
Entity File Number 001-39317  
Entity Registrant Name ON SEMICONDUCTOR CORPORATION  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 36-3840979  
Entity Address, Address Line One 5701 N. Pima Road  
Entity Address, City or Town Scottsdale  
Entity Address, State or Province AZ  
Entity Address, Postal Zip Code 85250  
City Area Code 602  
Local Phone Number 244-6600  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol ON  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   417,885,346
Entity Central Index Key 0001097864  
Current Fiscal Year End --12-31  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2025  
Amendment Flag false