Segment Information - Net Sales by Brand and Region (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Nov. 03, 2018	Oct. 28, 2017	Nov. 03, 2018	Oct. 28, 2017
Segment Reporting Information [Line Items]
Credit Card Revenue		$ 170		$ 449
Net Sales	[1]	$ 4,089	$ 3,838	$ 11,957	$ 11,077
Percentage of Net Sales	[1]	100.00%	100.00%	100.00%	100.00%
U.S.
Segment Reporting Information [Line Items]
Net Sales	[1],[2]	$ 3,274	$ 3,004	$ 9,614	$ 8,775
Percentage of Net Sales	[1],[2]	80.00%	79.00%	81.00%	79.00%
Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 316	$ 310	$ 874	$ 822
Percentage of Net Sales	[1]	8.00%	8.00%	7.00%	8.00%
Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 149	$ 158	$ 436	$ 446
Percentage of Net Sales	[1]	4.00%	4.00%	4.00%	4.00%
Asia
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 300	$ 312	$ 883	$ 883
Percentage of Net Sales	[1]	7.00%	8.00%	7.00%	8.00%
Other Regions
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 50	$ 54	$ 150	$ 151
Percentage of Net Sales	[1]	1.00%	1.00%	1.00%	1.00%
Gap
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 1,283	$ 1,322	$ 3,712	$ 3,712
Gap | U.S.
Segment Reporting Information [Line Items]
Net Sales	[1],[2]	738	750	2,146	2,137
Gap | Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	104	109	275	277
Gap | Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	145	154	425	435
Gap | Asia
Segment Reporting Information [Line Items]
Net Sales	[1]	266	278	779	780
Gap | Other Regions
Segment Reporting Information [Line Items]
Net Sales	[1]	30	31	87	83
Old Navy
Segment Reporting Information [Line Items]
Net Sales	[1]	1,947	1,758	5,684	5,077
Old Navy | U.S.
Segment Reporting Information [Line Items]
Net Sales	[1],[2]	1,769	1,587	5,175	4,609
Old Navy | Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	152	143	430	387
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]	13	13	36	34
Old Navy | Other Regions
Segment Reporting Information [Line Items]
Net Sales	[1]	13	15	43	47
Banana Republic
Segment Reporting Information [Line Items]
Net Sales	[1]	601	557	1,769	1,653
Banana Republic | U.S.
Segment Reporting Information [Line Items]
Net Sales	[1],[2]	510	467	1,503	1,396
Banana Republic | Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	59	57	167	156
Banana Republic | Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	4	4	11	11
Banana Republic | Asia
Segment Reporting Information [Line Items]
Net Sales	[1]	21	21	68	69
Banana Republic | Other Regions
Segment Reporting Information [Line Items]
Net Sales	[1]	7	8	20	21
Other
Segment Reporting Information [Line Items]
Net Sales	[1],[3]	258	201	792	635
Other | U.S.
Segment Reporting Information [Line Items]
Net Sales	[1],[2],[3]	257	200	790	633
Other | Canada
Segment Reporting Information [Line Items]
Net Sales	[1],[3]	1	1	2	2
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] Net sales for the thirteen and thirty-nine weeks ended November 3, 2018 reflect the adoption of the new revenue recognition standard, which resulted in an increase to net sales of $170 million and $449 million, respectively, for revenue sharing and reimbursements of loyalty program discounts associated with the Company's credit card programs, as well as breakage revenue for our gift cards and credit vouchers. Prior period amounts have not been restated and continue to be reported under accounting standards in effect for those periods.

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

[3] Primarily consists of net sales for the Athleta and Intermix brands. Beginning in the third quarter of fiscal 2018, the Hill City brand is also included.