Earnings (Loss) per Share - Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	May 01, 2021	May 02, 2020
Earnings Per Share [Abstract]
Net earnings (loss) attributable to Guess?, Inc.	$ 12,006	$ (157,666)
Less net earnings attributable to nonvested restricted stockholders	130	0
Net earnings (loss) attributable to common stockholders	$ 11,876	$ (157,666)
Weighted average common shares used in basic computations (in shares)	64,035,000	65,715,000
Effect of dilutive securities:
Stock options and restricted stock units (in shares)	1,905,000	0
Weighted average common shares used in diluted computations (in shares)	65,940,000	65,715,000
Net earnings (loss) per common share attributable to common stockholders:
Basic (in dollars per share)	$ 0.19	$ (2.40)
Diluted (in dollars per share)	$ 0.18	$ (2.40)
Antidilutive securities excluded from computation of earnings (loss) per share
Antidilutive equity awards excluded from computation of diluted weighted average common shares (in shares)	390,243	3,157,824
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)		484,674