Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended
	Oct. 29, 2011	Oct. 30, 2010	Oct. 29, 2011	Oct. 30, 2010	Mar. 31, 2011 2008 Share Repurchase Program	Oct. 30, 2010 2008 Share Repurchase Program	Mar. 31, 2011 2011 Share Repurchase Program	Oct. 29, 2011 2011 Share Repurchase Program
Earnings Per Share
Net earnings attributable to Guess?, Inc.	$ 66,295,000	$ 69,089,000	$ 169,634,000	$ 186,182,000
Less net earnings attributable to nonvested restricted stockholders	549,000	676,000	1,374,000	1,911,000
Net earnings attributable to common stockholders	65,746,000	68,413,000	168,260,000	184,271,000
Weighted average shares used in basic computations (in shares)	92,011,000	90,911,000	91,835,000	91,474,000
Effect of dilutive securities:
Stock options and restricted stock units (in shares)	327,000	632,000	444,000	700,000
Weighted average shares used in diluted computations (in shares)	92,338,000	91,543,000	92,279,000	92,174,000
Net earnings per common share attributable to common stockholders:
Basic (in dollars per share)	$ 0.71	$ 0.75	$ 1.83	$ 2.01
Diluted (in dollars per share)	$ 0.71	$ 0.75	$ 1.82	$ 2.00
Anti-dilutive equity awards excluded from computation of diluted weighted-average common shares (in shares)	1,069,973	795,166	968,128	700,936
Share Repurchase Program
Value of common stock remaining to be repurchased					84,900,000			250,000,000
Value of common stock authorized to be repurchased, maximum							250,000,000
Number of common stock repurchased (in shares)						1,500,000
Shares repurchased, aggregate cost				$ 49,361,000		$ 49,300,000