| Consolidated Statements of Operations [Abstract] | |
| Sales | 3.28B |
| Cost of sales | 2.33B |
| Gross profit | 954.6M |
| Selling, general and administrative expenses | 514.1M |
| Depreciation and amortization | 42.3M |
| Merger-related expenses | |
| Operating earnings | 396.3M |
| Interest income | -300K |
| Interest expense | -4.4M |
| Debt extinguishment expense | |
| Earnings before income tax expense | 401M |
| Income tax expense | 147.5M |
| Consolidated net income | 253.5M |
| Net loss attributable to noncontrolling interests | -300K |
| Consolidated net income attributable to GameStop | 253.2M |
| Basic net income per common share | 2.23 |
| Diluted net income per common share | 2.23 |
| Weighted average shares of common stock - basic | -267.8M |
| Weighted average shares of common stock - diluted | -269.2M |