v3.26.1
Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Jan. 30, 2026
Mar. 06, 2026
Aug. 01, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jan. 30, 2026    
Document Transition Report false    
Entity Registrant Name Science Applications International Corporation    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 46-1932921    
Entity Address, Address Description 12010 Sunset Hills Road    
Entity Address, City or Town Reston,    
Entity Address, State or Province VA    
Entity Address, Postal Zip Code 20190    
City Area Code (703)    
Local Phone Number 676-4300    
Title of 12(b) Security Common Stock, Par Value $.0001 Per Share    
Trading Symbol SAIC    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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 Public Float     $ 5.0
Entity Common Stock, Shares Outstanding (in shares)   43,419,313  
Documents Incorporated by Reference [Text Block] Portions of Science Applications International Corporation’s Definitive Proxy Statement for the 2026 Annual Meeting of Stockholders are incorporated by reference in Part III of this report.    
Entity Central Index Key 0001571123    
Amendment Flag false    
Document Fiscal Year Focus 2026    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --01-30    
Entity File Number 001-35832    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false