v3.26.1
Fair Value Measurements (Details) - EBP 001 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 5,931,416,000 $ 5,366,221,000
SAIC common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 89,951,000 108,969,000
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,722,727,000 1,616,263,000
Level 1 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,499,759,000 1,396,566,000
Level 1 | SAIC common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 89,951,000 108,969,000
Level 1 | Self-directed brokerage fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 133,017,000 110,728,000
Total    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,722,727,000 1,616,263,000
Total | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,499,759,000 1,396,566,000
Total | SAIC common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 89,951,000 108,969,000
Total | Self-directed brokerage fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 133,017,000 110,728,000
Collective trusts—measured at NAV | Collective trusts—measured at NAV    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 4,208,689,000 $ 3,749,958,000