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Unaudited Quarterly Consolidated Statement of Operations (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Feb. 02, 2013
Oct. 27, 2012
Jul. 28, 2012
Apr. 28, 2012
Jan. 28, 2012
Oct. 29, 2011
Jul. 30, 2011
Apr. 30, 2011
Feb. 02, 2013
Jan. 28, 2012
Jan. 29, 2011
Quarterly Financial Information [Line Items]                      
Net sales $ 3,561.5 [1] $ 1,772.8 [2] $ 1,550.2 $ 2,002.2 $ 3,578.6 [3] $ 1,946.8 [4] $ 1,743.7 $ 2,281.4 $ 8,886.7 $ 9,550.5 $ 9,473.7
Gross Profit 974.9 [1] 557.4 [2] 519.3 599.9 943.2 [3] 572.9 [4] 543.2 620.2 2,651.5 2,679.5 2,537.6
Operating earnings (loss) 412.3 [1] (603.5) [2] 34.5 115.0 302.5 [3] 82.6 [4] 53.6 131.1 (41.6) 569.9 662.6
Consolidated net income (loss) attributable to GameStop Corp. $ 261.1 [1] $ (624.3) [2] $ 21.0 $ 72.5 $ 174.7 [3] $ 53.9 [4] $ 30.9 $ 80.4 $ (269.7) $ 339.9 $ 408.0
Basic net income (loss) per common share $ 2.17 [1] $ (5.08) [2] $ 0.16 $ 0.54 $ 1.28 [3] $ 0.39 [4] $ 0.22 $ 0.56 $ (2.13) [5] $ 2.43 [5] $ 2.69 [5]
Diluted net income (loss) per common share $ 2.15 [1] $ (5.08) [2] $ 0.16 $ 0.54 $ 1.27 [3] $ 0.39 [4] $ 0.22 $ 0.56 $ (2.13) [5] $ 2.41 [5] $ 2.65 [5]
Dividend declared per common share $ 0.25 [1] $ 0.25 [2] $ 0.15 $ 0.15 $ 0.00 [3] $ 0.00 [4] $ 0.00 $ 0.00 $ 0.25 [1] $ 0.00 [3]  
[1] The results of operations for the fourth quarter of the fiscal year ended February 2, 2013 include asset impairments of $1.9 million.
[2] The results of operations for the third quarter of the fiscal year ended February 2, 2013 include goodwill impairments of $627.0 million and asset impairments of $51.8 million.
[3] The results of operations for the fourth quarter of the fiscal year ended January 28, 2012 include asset impairments and restructuring charges of $81.2 million and debt extinguishment expense of $0.4 million.
[4] The results of operations for the third quarter of the fiscal year ended January 28, 2012 include debt extinguishment expense of $0.6 million.
[5] Basic net income (loss) per common share and diluted net income (loss) per common share are calculated based on consolidated net income (loss) attributable to GameStop Corp.