Segment Information - Net Sales by Brand and Region (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Aug. 03, 2019	Aug. 04, 2018	Aug. 03, 2019	Aug. 04, 2018
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 4,005	$ 4,085	$ 7,711	$ 7,868
Percentage of Net Sales	[1]	100.00%	100.00%	100.00%	100.00%
U.S.
Segment Reporting Information [Line Items]
Net Sales	[1],[2]	$ 3,300	$ 3,322	$ 6,322	$ 6,340
Percentage of Net Sales	[1],[2]	83.00%	82.00%	82.00%	81.00%
Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 286	$ 303	$ 531	$ 558
Percentage of Net Sales	[1]	7.00%	7.00%	7.00%	7.00%
Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 135	$ 148	$ 259	$ 287
Percentage of Net Sales	[1]	3.00%	4.00%	3.00%	4.00%
Asia
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 235	$ 262	$ 504	$ 583
Percentage of Net Sales	[1]	6.00%	6.00%	7.00%	7.00%
Other Regions
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 49	$ 50	$ 95	$ 100
Percentage of Net Sales	[1]	1.00%	1.00%	1.00%	1.00%
Gap
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 1,086	$ 1,225	$ 2,138	$ 2,429
Gap | U.S.
Segment Reporting Information [Line Items]
Net Sales	[1],[2]	645	728	1,253	1,408
Gap | Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	85	94	154	171
Gap | Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	131	145	252	280
Gap | Asia
Segment Reporting Information [Line Items]
Net Sales	[1]	201	229	434	513
Gap | Other Regions
Segment Reporting Information [Line Items]
Net Sales	[1]	24	29	45	57
Old Navy
Segment Reporting Information [Line Items]
Net Sales	[1]	1,972	1,992	3,771	3,737
Old Navy | U.S.
Segment Reporting Information [Line Items]
Net Sales	[1],[2]	1,794	1,816	3,435	3,406
Old Navy | Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	148	151	276	278
Old Navy | Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	0	0	0	0
Old Navy | Asia
Segment Reporting Information [Line Items]
Net Sales	[1]	11	11	21	23
Old Navy | Other Regions
Segment Reporting Information [Line Items]
Net Sales	[1]	19	14	39	30
Banana Republic
Segment Reporting Information [Line Items]
Net Sales	[1]	616	604	1,184	1,168
Banana Republic | U.S.
Segment Reporting Information [Line Items]
Net Sales	[1],[2]	530	514	1,017	993
Banana Republic | Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	53	58	100	108
Banana Republic | Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	4	3	7	7
Banana Republic | Asia
Segment Reporting Information [Line Items]
Net Sales	[1]	23	22	49	47
Banana Republic | Other Regions
Segment Reporting Information [Line Items]
Net Sales	[1]	6	7	11	13
Other
Segment Reporting Information [Line Items]
Net Sales	[1],[3]	331	264	618	534
Other | U.S.
Segment Reporting Information [Line Items]
Net Sales	[1],[2],[3]	331	264	617	533
Other | Canada
Segment Reporting Information [Line Items]
Net Sales	[1],[3]	0	0	1	1
Other | Europe
Segment Reporting Information [Line Items]
Net Sales	[1],[3]	0	0	0	0
Other | Asia
Segment Reporting Information [Line Items]
Net Sales	[1],[3]	0	0	0	0
Other | Other Regions
Segment Reporting Information [Line Items]
Net Sales	[1],[3]	$ 0	$ 0	$ 0	$ 0

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

[2] Primarily consists of net sales for the Athleta and Intermix brands, as well as a portion of income related to our credit card agreement. Beginning in the third quarter of fiscal year 2018, the Hill City brand is also included.

[3] Beginning on March 4, 2019, Banana Republic Global includes net sales for the Janie and Jack brand.