Quarterly Information (Unaudited) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Jan. 30, 2021	Oct. 31, 2020	Aug. 01, 2020	May 02, 2020	Feb. 01, 2020	Nov. 02, 2019	Aug. 03, 2019	May 04, 2019	Jan. 30, 2021	Feb. 01, 2020	Feb. 02, 2019	Apr. 30, 2019
Summary of the unaudited quarterly financial information
Net revenue	$ 648,455,000	$ 569,284,000	$ 398,539,000	$ 260,251,000	$ 842,254,000	$ 615,944,000	$ 683,220,000	$ 536,691,000
Gross profit	276,325,000	239,520,000	147,028,000	34,229,000	338,594,000	229,499,000	265,666,000	181,949,000	$ 697,102,000	$ 1,015,708,000	$ 939,604,000
Net earnings (loss)	72,935,000	27,554,000	(20,692,000)	(160,538,000)	82,049,000	13,585,000	26,176,000	(20,581,000)	(80,741,000)	101,229,000	17,166,000
Net earnings (loss) attributable to Guess?, Inc.	$ 70,419,000	$ 26,376,000	$ (20,358,000)	$ (157,666,000)	$ 79,604,000	$ 12,423,000	$ 25,322,000	$ (21,374,000)	$ (81,229,000)	$ 95,975,000	$ 14,099,000
Net earnings (loss) per common share attributable to common stockholders:
Basic (in dollars per share)	$ 1.10	$ 0.41	$ (0.31)	$ (2.40)	$ 1.21	$ 0.19	$ 0.36	$ (0.27)	$ (1.27)	$ 1.35	$ 0.17
Diluted (in dollars per share)	$ 1.07	$ 0.41	$ (0.31)	$ (2.40)	$ 1.18	$ 0.18	$ 0.35	$ (0.27)	$ (1.27)	$ 1.33	$ 0.16
Selected quarterly financial information
Separation charges				$ 200,000
Non-cash stock-based compensation expenses		$ 700,000	$ 2,500,000		$ 400,000
Professional service and legal costs and related (credits) costs	$ (500,000)	(200,000)	(200,000)	300,000	(100,000)	$ (1,400,000)	$ 400,000	$ 300,000
Asset impairment charges	5,200,000	$ 10,300,000	12,000,000.0	53,000,000.0	$ 4,900,000	$ 1,800,000	$ 1,500,000	$ 1,800,000	$ 80,442,000	$ 9,977,000	$ 6,939,000
Net gains (losses) on lease terminations	$ 2,400,000		$ 900,000	$ (500,000)
Fiscal period duration	91 days	91 days	91 days	91 days	91 days	91 days	91 days	91 days	364 days	364 days	364 days
Deferred tax assets cumulative valuation allowance, amount	$ (700,000)	$ 1,200,000		$ 3,700,000
Income tax expense (benefit)	$ (3,800,000)	$ 700,000	$ (7,900,000)	$ 11,800,000
2.00% Convertible Senior Notes Due 2024 | Senior notes
Selected quarterly financial information
Convertible debt issued												$ 300,000,000