Earnings (Loss) per Share - Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Earnings Per Share [Abstract]
Net earnings (loss) attributable to Guess?, Inc.	$ 61,062	$ (20,358)	$ 73,068	$ (178,024)
Less net earnings attributable to nonvested restricted stockholders	699	0	775	0
Net earnings (loss) attributable to common stockholders, basic	60,363	(20,358)	72,293	(178,024)
Net earnings (loss) attributable to common stockholders, diluted	$ 60,363	$ (20,358)	$ 72,293	$ (178,024)
Weighted average common shares used in basic computations (in shares)	64,336,000	65,177,000	64,185,000	65,446,000
Effect of dilutive securities:
Effect of dilutive securities: Stock options, convertible senior notes and restricted stock units (in shares)	1,738,000	0	1,748,000	0
Weighted average common shares used in diluted computations (in shares)	66,074,000	65,177,000	65,933,000	65,446,000
Net earnings (loss) per common share attributable to common stockholders:
Basic (in dollars per share)	$ 0.94	$ (0.31)	$ 1.13	$ (2.72)
Diluted (in dollars per share)	$ 0.91	$ (0.31)	$ 1.10	$ (2.72)
Antidilutive securities excluded from computation of earnings (loss) per share
Antidilutive equity awards excluded from computation of diluted weighted average common shares (in shares)	272,705	4,121,433	326,474	3,890,881
Potentially Dilutive Shares
Antidilutive securities excluded from computation of earnings (loss) per share
Antidilutive equity awards excluded from computation of diluted weighted average common shares (in shares)		262,086		382,222