Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended		1 Months Ended	6 Months Ended	1 Months Ended	6 Months Ended
	Jul. 30, 2011	Jul. 31, 2010	Jul. 30, 2011	Jul. 31, 2010	Mar. 31, 2011 2008 Share Repurchase Program	Jul. 31, 2010 2008 Share Repurchase Program	Mar. 31, 2011 2011 Share Repurchase Program	Jul. 30, 2011 2011 Share Repurchase Program
Earnings Per Share
Net earnings attributable to Guess?, Inc.	$ 60,657,000	$ 66,758,000	$ 103,339,000	$ 117,093,000
Net earnings attributable to nonvested restricted stockholders	512,000	668,000	811,000	1,228,000
Net earnings attributable to common stockholders	60,145,000	66,090,000	102,528,000	115,865,000
Weighted average shares used in basic computations (in shares)	91,864,000	91,610,000	91,746,000	91,756,000
Effect of dilutive securities:
Stock options and restricted stock units (in shares)	504,000	543,000	535,000	715,000
Weighted average shares used in diluted computations (in shares)	92,368,000	92,153,000	92,281,000	92,471,000
Net earnings per common share attributable to common stockholders:
Basic (in dollars per share)	$ 0.65	$ 0.72	$ 1.12	$ 1.26
Diluted (in dollars per share)	$ 0.65	$ 0.72	$ 1.11	$ 1.25
Anti-dilutive equity awards excluded from computation of diluted weighted-average common shares (in shares)	821,104	779,636	536,291	654,269
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