Sales of Receivables (Details) $ in Millions	May 01, 2026 USD ($)
Receivables [Abstract]
Maximum commitment	$ 300

TransfersOfFinancialAssetsAccountedForAsSalesMarpaMaximumCommitment

No definition available.

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