v3.7.0.1
Segment Information - Narrative (Detail)
 3 Months Ended 6 Months Ended
Jul. 29, 2017
USD ($)
Location
Jul. 30, 2016
USD ($)
Jul. 29, 2017
USD ($)
Location
Jul. 30, 2016
USD ($)
Segment Reporting Disclosure [Line Items]        
Number of Reportable Segments     5  
Net sales $ 1,687,600,000 $ 1,631,800,000 $ 3,733,500,000 $ 3,603,300,000
Segment Reporting Description Of Segments     Segment results for the United States include retail operations in 50 states, the District of Columbia, Guam and Puerto Rico; our electronic commerce websites www.gamestop.com and www.thinkgeek.com; Game Informer magazine; and Kongregate, our leading web and mobile gaming platform.  
Segment operating earnings (loss) 43,600,000 58,300,000 $ 144,700,000 172,300,000
Interest income 0 300,000 200,000 500,000
Interest expense (14,400,000) (13,900,000) (28,500,000) (24,900,000)
Earnings before income taxes 29,200,000 44,700,000 $ 116,400,000 147,900,000
Video Game Brands - United States [Member]        
Segment Reporting Disclosure [Line Items]        
Number of Reportable Segments     4  
Technology Brands [Member]        
Segment Reporting Disclosure [Line Items]        
Net sales 188,300,000 175,900,000 $ 389,700,000 341,700,000
Segment operating earnings (loss) $ 15,000,000 13,900,000 26,100,000 32,700,000
Intersegment Eliminations [Member]        
Segment Reporting Disclosure [Line Items]        
Net sales     $ 0  
United States        
Segment Reporting Disclosure [Line Items]        
Number of states the entity operates | Location 50   50  
United States | Video Game Brands - United States [Member]        
Segment Reporting Disclosure [Line Items]        
Net sales $ 1,017,800,000 1,022,700,000 $ 2,357,300,000 2,391,300,000
Segment operating earnings (loss) 37,200,000 51,200,000 123,100,000 145,600,000
Europe | Video Game Brands - Europe [Member]        
Segment Reporting Disclosure [Line Items]        
Net sales 266,300,000 239,200,000 544,700,000 488,700,000
Segment operating earnings (loss) $ (11,400,000) (11,000,000) $ (11,300,000) (14,500,000)
Europe | Retail Site        
Segment Reporting Disclosure [Line Items]        
Number of countries in which the entity operates | Location 10   10  
CANADA | Video Game Brands - Canada [Member]        
Segment Reporting Disclosure [Line Items]        
Net sales $ 69,900,000 66,600,000 $ 159,800,000 144,300,000
Segment operating earnings (loss) (300,000) 1,200,000 1,900,000 5,000,000
Australia And New Zealand [Member] | Video Game Brands - Australia [Member]        
Segment Reporting Disclosure [Line Items]        
Net sales 145,300,000 127,400,000 282,000,000 237,300,000
Segment operating earnings (loss) $ 3,100,000 $ 3,000,000 $ 4,900,000 $ 3,500,000