Segment Information - Net Sales by Brand and Region (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jul. 30, 2016		Aug. 01, 2015		Jul. 30, 2016		Aug. 01, 2015
Segment Reporting Information [Line Items]
Net sales		$ 3,851		$ 3,898		$ 7,289		$ 7,555
Percentage of Net Sales		100.00%		100.00%		100.00%		100.00%
Sales growth (decline)		(1.00%)		(2.00%)		(4.00%)		(3.00%)
U.S.
Segment Reporting Information [Line Items]
Net sales	[1]	$ 2,972		$ 3,035		$ 5,630		$ 5,863
Percentage of Net Sales	[1]	77.00%		78.00%		77.00%		78.00%
Canada
Segment Reporting Information [Line Items]
Net sales		$ 278		$ 272		$ 494		$ 496
Percentage of Net Sales		7.00%		7.00%		7.00%		6.00%
Europe
Segment Reporting Information [Line Items]
Net sales		$ 176		$ 196		$ 334		$ 377
Percentage of Net Sales		5.00%		5.00%		5.00%		5.00%
Asia
Segment Reporting Information [Line Items]
Net sales		$ 375		$ 346		$ 731		$ 701
Percentage of Net Sales		10.00%		9.00%		10.00%		9.00%
Other Regions
Segment Reporting Information [Line Items]
Net sales		$ 50		$ 49		$ 100		$ 118
Percentage of Net Sales		1.00%		1.00%		1.00%		2.00%
Gap
Segment Reporting Information [Line Items]
Net sales		$ 1,313		$ 1,368		$ 2,536		$ 2,676
Sales growth (decline)		(4.00%)		(7.00%)		(5.00%)		(8.00%)
Gap | U.S.
Segment Reporting Information [Line Items]
Net sales	[1]	$ 749		$ 795		$ 1,447		$ 1,530
Gap | Canada
Segment Reporting Information [Line Items]
Net sales		92		88		162		157
Gap | Europe
Segment Reporting Information [Line Items]
Net sales		159		176		303		340
Gap | Asia
Segment Reporting Information [Line Items]
Net sales		280		270		560		555
Gap | Other Regions
Segment Reporting Information [Line Items]
Net sales		33		39		64		94
Old Navy
Segment Reporting Information [Line Items]
Net sales		$ 1,705		$ 1,675		$ 3,191		$ 3,227
Sales growth (decline)		2.00%		3.00%		(1.00%)		4.00%
Old Navy | U.S.
Segment Reporting Information [Line Items]
Net sales	[1]	$ 1,500		$ 1,500		$ 2,828		$ 2,903
Old Navy | Canada
Segment Reporting Information [Line Items]
Net sales		129		124		227		226
Old Navy | Europe
Segment Reporting Information [Line Items]
Net sales		0		0		0		0
Old Navy | Asia
Segment Reporting Information [Line Items]
Net sales		66		49		116		92
Old Navy | Other Regions
Segment Reporting Information [Line Items]
Net sales		10		2		20		6
Banana Republic
Segment Reporting Information [Line Items]
Net sales		$ 633		$ 677		$ 1,183		$ 1,298
Sales growth (decline)		(6.00%)		(4.00%)		(9.00%)		(5.00%)
Banana Republic | U.S.
Segment Reporting Information [Line Items]
Net sales	[1]	$ 523		$ 563		$ 977		$ 1,078
Banana Republic | Canada
Segment Reporting Information [Line Items]
Net sales		57		59		104		111
Banana Republic | Europe
Segment Reporting Information [Line Items]
Net sales		17		20		31		37
Banana Republic | Asia
Segment Reporting Information [Line Items]
Net sales		29		27		55		54
Banana Republic | Other Regions
Segment Reporting Information [Line Items]
Net sales		7		8		16		18
Other
Segment Reporting Information [Line Items]
Net sales		$ 200	[2]	$ 178	[2]	$ 379	[2]	$ 354	[3]
Sales growth (decline)		12.00%	[2]	(4.00%)	[2]	7.00%	[2]	(4.00%)	[3]
Other | U.S.
Segment Reporting Information [Line Items]
Net sales	[1]	$ 200	[2]	$ 177	[2]	$ 378	[2]	$ 352	[3]
Other | Canada
Segment Reporting Information [Line Items]
Net sales		0	[2]	1	[2]	1	[2]	2	[3]
Other | Europe
Segment Reporting Information [Line Items]
Net sales		0	[2]	0	[2]	0	[2]	0	[3]
Other | Asia
Segment Reporting Information [Line Items]
Net sales		0	[2]	0	[2]	0	[2]	0	[3]
Other | Other Regions
Segment Reporting Information [Line Items]
Net sales		$ 0	[2]	$ 0	[2]	$ 0	[2]	$ 0	[3]

[1] U.S. includes the United States, Puerto Rico, and Guam.

[2] Includes Athleta and Intermix.

[3] Includes Athleta, Intermix, and Piperlime, which was discontinued as of the first quarter of fiscal 2015.