Organization and Summary of Significant Accounting Policies Credit Cards (Details) $ in Millions	12 Months Ended
Feb. 03, 2018 USD ($)
Credit Card [Abstract]
Income from Revenue Sharing from Credit Card Programs	$ 412
Reimbursements of loyalty program discounts associated with our Credit Card programs	$ 174

Reimbursements of loyalty program discounts associated with our Credit Card programs

No definition available.

Name:	gps_ReimbursementsofloyaltyprogramdiscountsassociatedwithourCreditCardprograms
Namespace Prefix:	gps_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration