Sale of Receivables (Details) - USD ($) $ in Millions	12 Months Ended
Jan. 30, 2026	Jan. 31, 2025	Feb. 02, 2024	Jan. 21, 2020
Receivables [Abstract]
Maximum commitment				$ 300
Purchase discount fees	$ 12	$ 14	$ 9

TransfersOfFinancialAssetsAccountedForAsSalesMarpaMaximumCommitment

No definition available.

Name:	saic_TransfersOfFinancialAssetsAccountedForAsSalesMarpaMaximumCommitment
Namespace Prefix:	saic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant