Earnings (Loss) per Share - Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Earnings Per Share [Abstract]
Net earnings (loss) attributable to Guess?, Inc.	$ 26,376	$ 12,423	$ (151,648)	$ 16,371
Less net earnings attributable to nonvested restricted stockholders	340	118	93	306
Net earnings (loss) attributable to common stockholders	$ 26,036	$ 12,305	$ (151,741)	$ 16,065
Weighted average common shares used in basic computations (in shares)	62,789,000	66,393,000	64,561,000	72,275,000
Effect of dilutive securities:
Stock options and restricted stock units (in shares)	790,000	921,000	0	936,000
Weighted average common shares used in diluted computations (in shares)	63,579,000	67,314,000	64,561,000	73,211,000
Net earnings (loss) per common share attributable to common stockholders:
Basic (in dollars per share)	$ 0.41	$ 0.19	$ (2.35)	$ 0.22
Diluted (in dollars per share)	$ 0.41	$ 0.18	$ (2.35)	$ 0.22
Antidilutive securities excluded from computation of earnings (loss) per share
Antidilutive equity awards excluded from computation of diluted weighted average common shares (in shares)	3,610,026	3,277,923	3,792,552	3,067,758
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)			397,099
Performance Shares
Antidilutive securities excluded from computation of earnings (loss) per share
Performance or market awards excluded from computation of EPS (in shares)	525,875	1,182,805	525,875	1,182,805