Transactions with Parties-In-Interest and Related Parties (Details) - EBP 001 - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
EBP, Related Party and Party-in-Interest Transactions [Line Items]
Investments, at fair value	$ 5,931,416,000	$ 5,366,221,000
Appreciation (depreciation) in value	703,366,000	514,368,000
SAIC common stock
EBP, Related Party and Party-in-Interest Transactions [Line Items]
Investments, at fair value	89,951,000	108,969,000
Dividends earned	1,381,000	1,491,000
Appreciation (depreciation) in value	$ (10,095,000)	$ (12,662,000)

Fair value of investment, excluding plan interest in master trust, held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract not meeting fully-benefit responsive investment criteria.

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+ Details