Document and Entity Information - shares	9 Months Ended
	Nov. 03, 2018	Nov. 26, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Document Period End Date	Nov. 03, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Trading Symbol	GPS
Entity Registrant Name	GAP INC
Entity Central Index Key	0000039911
Current Fiscal Year End Date	--02-02
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		381,434,098