Summary of Significant Accounting Policies	6 Months Ended
Jul. 29, 2017
Accounting Policies [Abstract]
Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]	The Company GameStop Corp. (“GameStop,” “we,” “us,” “our,” or the “Company”) is a global family of specialty retail brands that makes the most popular technologies affordable and simple. Within our family of brands, we are the world’s largest omnichannel video game retailer, the largest AT&T® (“AT&T”) authorized retailer, the largest Apple© certified products reseller, a Cricket Wireless_TM reseller (“Cricket,” an AT&T brand) and the owner of www.thinkgeek.com, one of the world’s largest sellers of collectible pop-culture themed products. As of July 29, 2017, GameStop's retail network and family of brands include 7,480 company-operated stores in the United States, Australia, Canada and Europe. We have five reportable segments, which are comprised of four geographic Video Game Brands segments—United States, Canada, Australia and Europe—and a Technology Brands segment. Our Technology Brands segment includes our Spring Mobile and Simply Mac businesses. Spring Mobile owns and operates our AT&T branded wireless retail stores and Cricket branded pre-paid wireless stores. Basis of Presentation and Consolidation The unaudited condensed consolidated financial statements include our accounts and the accounts of our wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The unaudited condensed consolidated financial statements included herein reflect all adjustments (consisting only of normal, recurring adjustments) which are, in our opinion, necessary for a fair presentation of the information as of and for the periods presented. These unaudited condensed consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and the instructions to Quarterly Report on Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all disclosures required under GAAP for complete consolidated financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with our annual report on Form 10-K for the 52 weeks ended January 28, 2017 (the “2016 Annual Report on Form 10-K”). The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. In preparing these financial statements, we have made our best estimates and judgments of certain amounts included in the financial statements, giving due consideration to materiality. Changes in the estimates and assumptions used by us could have a significant impact on our financial results. Actual results could differ from those estimates. Due to the seasonal nature of our business, the results of operations for the 26 weeks ended July 29, 2017 are not indicative of the results to be expected for the 53 weeks ending February 3, 2018. Restricted Cash Restricted cash of $14.7 million, $10.3 million and $10.2 million as of July 29, 2017, July 30, 2016 and January 28, 2017, respectively, consists primarily of bank deposits serving as collateral for bank guarantees issued on behalf of our foreign subsidiaries and is included in other noncurrent assets in our unaudited condensed consolidated balance sheets. Dividend On August 21, 2017, our Board of Directors approved a quarterly cash dividend to our stockholders of $0.38 per share of Class A Common Stock payable on September 21, 2017 to stockholders of record at the close of business on September 8, 2017. Future dividends will be subject to approval by our Board of Directors. Adoption of New Accounting Pronouncements In January 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2017-04, Intangibles—Goodwill and Other, Simplifying the Test for Goodwill Impairment, which simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill and the carrying amount. Instead, entities will record an impairment charge based on the excess of a reporting unit's carrying amount over its estimated fair value. We early adopted this updated standard which did not have an impact to our consolidated financial statements. In October 2016, the FASB issued ASU 2016-16, Accounting for Income Taxes: Intra-Entity Asset Transfers of Assets Other than Inventory, which eliminates the exception to defer the tax effects of intra-entity asset transfers (intercompany sales). Prior to this update, the tax effects of intra-entity asset transfers were deferred until the transferred asset was sold to a third party or otherwise recovered through use, which was an exception to the general requirement for comprehensive recognition of current and deferred income taxes. We early adopted this updated standard, effective January 29, 2017, and as a result we recognize tax expense or benefit from intercompany sales of assets other than inventory in the period in which the transaction occurs. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, which simplifies several aspects of accounting for employee share-based payment transactions. The amendments of the updated standard include, among other things, the requirement to recognize excess tax benefits and deficiencies through earnings and present the related cash flows in operating activities in the statement of cash flows, the election of a policy to either estimate forfeitures when determining periodic expense or recognize actual forfeitures when they occur, and an increase in the allowable income tax withholding from the minimum to maximum statutory rate and its classification in the statement of cash flows. As a result of the adoption of this updated standard, effective January 29, 2017, excess tax benefits and deficiencies are recognized in our results of operations and are presented in cash flows from operating activities in our statement of cash flows on a prospective basis. In addition, we elected to recognize actual forfeitures of stock-based awards as they occur. The adoption of this updated standard did not result in a material impact to our consolidated financial statements. Recently Issued Accounting Pronouncements In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows, Classification of Certain Cash Receipts and Cash Payments, which provides guidance on eight specific cash flow issues in regard to how cash receipts and cash payments are presented and classified in the statement of cash flows. The updated standard is effective for fiscal years beginning after December 15, 2017, including interim periods within those years, with early adoption permitted. The amendments in the ASU should be adopted on a retrospective basis unless it is impracticable to apply, in which case the amendments should be applied prospectively as of the earliest date practicable. We are currently evaluating the impact that this standard will have on our consolidated financial statements and disclosures. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which sets forth a new five-step revenue recognition model that replaces the prior revenue recognition guidance in its entirety. The underlying principle of the new standard is that an entity will recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects what it expects in exchange for the goods or services. The updated standard also required additional disclosures on the nature, timing, and uncertainty of revenue and related cash flows. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers: Deferral of the Effective Date, which delays the effective date of ASU 2014-09 by one year to December 15, 2017 (with early adoption permitted). In 2016, the FASB issued several ASUs that further amended the new revenue standard in the areas of principal versus agent evaluation, licenses of intellectual property, identifying performance obligations, and other clarifications and technical corrections. Entities may use either a full retrospective or modified retrospective transition approach in applying these ASUs. We plan to adopt these new standards in the first quarter of fiscal 2018 and intend to utilize the modified retrospective transition approach. We do not expect the adoption of the new revenue standards to have a material impact to our consolidated balance sheets, statements of operations or statements of cash flows. Based on our ongoing evaluation, we expect that the new revenue standards will primarily impact the accounting of our PowerUp Rewards loyalty program and the recognition of breakage associated with our gift cards liability. For our loyalty program, we currently estimate the net cost of the rewards that will be issued and redeemed and record this cost (presented as cost of sales) and the associated balance sheet liability as points are accumulated by our loyalty program members. Under the new standards, the transaction price will be allocated between the product(s) sold and loyalty points earned, where the portion allocated to the loyalty points will be initially recorded as deferred revenue and subsequently recognized as revenue upon redemption or expiration of the loyalty points. Estimated breakage on unused gift cards and merchandise credit liabilities is currently recognized on a quarterly basis (recorded to cost of sales) for balances older than two years to the extent that we believe the likelihood of redemption is remote. Under the new standards, we will recognize breakage in revenue based on and in proportion to historical redemption patterns, regardless of the age of the unused gift cards and merchandise credit liabilities. Significant items yet to be finalized in our implementation efforts include quantification of the cumulative-effect adjustments to be recorded upon adoption, which we do not expect to be material; our ongoing evaluation of changes to business processes and related controls; and the impact of the new revenue-related disclosure requirements to our consolidated financial statements. In March 2016, the FASB issued ASU 2016-04, Recognition of Breakage for Certain Prepaid Stored-Value Products. The standard specifies how prepaid stored-value product liabilities should be derecognized, thereby eliminating the current and potential future diversity in practice. Consistent with ASU 2014-09 related to revenue recognition, the standard requires derecognition in proportion with the rights expected to be exercised by the holder. Entities may adopt this standard using either a modified retrospective transition approach with a cumulative-effect adjustment to retained earnings or a full retrospective transition approach. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2017, with early adoption permitted. We continue to evaluate the impact that this standard will have on our consolidated financial statements and footnote disclosures. In February 2016, the FASB issued ASU 2016-02, Leases. The standard requires a lessee to recognize a liability related to lease payments and an offsetting right-of-use asset representing a right to use the underlying asset for the lease term on the balance sheet. Entities are required to use a modified retrospective transition approach for leases that exist or are entered into after the beginning of the earliest comparative period presented in the financial statements, with certain reliefs available. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018, with early adoption permitted. We are currently evaluating the overall impact to our consolidated financial statements, though we expect the adoption to result in a material increase in the assets and liabilities reflected in our consolidated balance sheets.

The Company

GameStop Corp. (“GameStop,” “we,” “us,” “our,” or the “Company”) is a global family of specialty retail brands that makes the most popular technologies affordable and simple. Within our family of brands, we are the world’s largest omnichannel video game retailer, the largest AT&T® (“AT&T”) authorized retailer, the largest Apple© certified products reseller, a Cricket Wireless_TM reseller (“Cricket,” an AT&T brand) and the owner of www.thinkgeek.com, one of the world’s largest sellers of collectible pop-culture themed products. As of July 29, 2017, GameStop's retail network and family of brands include 7,480 company-operated stores in the United States, Australia, Canada and Europe.

We have five reportable segments, which are comprised of four geographic Video Game Brands segments—United States, Canada, Australia and Europe—and a Technology Brands segment. Our Technology Brands segment includes our Spring Mobile and Simply Mac businesses. Spring Mobile owns and operates our AT&T branded wireless retail stores and Cricket branded pre-paid wireless stores.

Basis of Presentation and Consolidation

The unaudited condensed consolidated financial statements include our accounts and the accounts of our wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The unaudited condensed consolidated financial statements included herein reflect all adjustments (consisting only of normal, recurring adjustments) which are, in our opinion, necessary for a fair presentation of the information as of and for the periods presented. These unaudited condensed consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and the instructions to Quarterly Report on Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all disclosures required under GAAP for complete consolidated financial statements.

These unaudited condensed consolidated financial statements should be read in conjunction with our annual report on Form 10-K for the 52 weeks ended January 28, 2017 (the “2016 Annual Report on Form 10-K”). The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. In preparing these financial statements, we have made our best estimates and judgments of certain amounts included in the financial statements, giving due consideration to materiality. Changes in the estimates and assumptions used by us could have a significant impact on our financial results. Actual results could differ from those estimates. Due to the seasonal nature of our business, the results of operations for the 26 weeks ended July 29, 2017 are not indicative of the results to be expected for the 53 weeks ending February 3, 2018.

Restricted Cash

Restricted cash of $14.7 million, $10.3 million and $10.2 million as of July 29, 2017, July 30, 2016 and January 28, 2017, respectively, consists primarily of bank deposits serving as collateral for bank guarantees issued on behalf of our foreign subsidiaries and is included in other noncurrent assets in our unaudited condensed consolidated balance sheets.

Dividend

On August 21, 2017, our Board of Directors approved a quarterly cash dividend to our stockholders of $0.38 per share of Class A Common Stock payable on September 21, 2017 to stockholders of record at the close of business on September 8, 2017. Future dividends will be subject to approval by our Board of Directors.

Adoption of New Accounting Pronouncements

In January 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2017-04, Intangibles—Goodwill and Other, Simplifying the Test for Goodwill Impairment, which simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill and the carrying amount. Instead, entities will record an impairment charge based on the excess of a reporting unit's carrying amount over its estimated fair value. We early adopted this updated standard which did not have an impact to our consolidated financial statements.

In October 2016, the FASB issued ASU 2016-16, Accounting for Income Taxes: Intra-Entity Asset Transfers of Assets Other than Inventory, which eliminates the exception to defer the tax effects of intra-entity asset transfers (intercompany sales). Prior to this update, the tax effects of intra-entity asset transfers were deferred until the transferred asset was sold to a third party or otherwise recovered through use, which was an exception to the general requirement for comprehensive recognition of current and deferred income taxes. We early adopted this updated standard, effective January 29, 2017, and as a result we recognize tax expense or benefit from intercompany sales of assets other than inventory in the period in which the transaction occurs.

In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, which simplifies several aspects of accounting for employee share-based payment transactions. The amendments of the updated standard include, among other things, the requirement to recognize excess tax benefits and deficiencies through earnings and present the related cash flows in operating activities in the statement of cash flows, the election of a policy to either estimate forfeitures when determining periodic expense or recognize actual forfeitures when they occur, and an increase in the allowable income tax withholding from the minimum to maximum statutory rate and its classification in the statement of cash flows. As a result of the adoption of this updated standard, effective January 29, 2017, excess tax benefits and deficiencies are recognized in our results of operations and are presented in cash flows from operating activities in our statement of cash flows on a prospective basis. In addition, we elected to recognize actual forfeitures of stock-based awards as they occur. The adoption of this updated standard did not result in a material impact to our consolidated financial statements.

Recently Issued Accounting Pronouncements

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows, Classification of Certain Cash Receipts and Cash Payments, which provides guidance on eight specific cash flow issues in regard to how cash receipts and cash payments are presented and classified in the statement of cash flows. The updated standard is effective for fiscal years beginning after December 15, 2017, including interim periods within those years, with early adoption permitted. The amendments in the ASU should be adopted on a retrospective basis unless it is impracticable to apply, in which case the amendments should be applied prospectively as of the earliest date practicable. We are currently evaluating the impact that this standard will have on our consolidated financial statements and disclosures.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which sets forth a new five-step revenue recognition model that replaces the prior revenue recognition guidance in its entirety. The underlying principle of the new standard is that an entity will recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects what it expects in exchange for the goods or services. The updated standard also required additional disclosures on the nature, timing, and uncertainty of revenue and related cash flows. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers: Deferral of the Effective Date, which delays the effective date of ASU 2014-09 by one year to December 15, 2017 (with early adoption permitted). In 2016, the FASB issued several ASUs that further amended the new revenue standard in the areas of principal versus agent evaluation, licenses of intellectual property, identifying performance obligations, and other clarifications and technical corrections. Entities may use either a full retrospective or modified retrospective transition approach in applying these ASUs. We plan to adopt these new standards in the first quarter of fiscal 2018 and intend to utilize the modified retrospective transition approach. We do not expect the adoption of the new revenue standards to have a material impact to our consolidated balance sheets, statements of operations or statements of cash flows.

Based on our ongoing evaluation, we expect that the new revenue standards will primarily impact the accounting of our PowerUp Rewards loyalty program and the recognition of breakage associated with our gift cards liability. For our loyalty program, we currently estimate the net cost of the rewards that will be issued and redeemed and record this cost (presented as cost of sales) and the associated balance sheet liability as points are accumulated by our loyalty program members. Under the new standards, the transaction price will be allocated between the product(s) sold and loyalty points earned, where the portion allocated to the loyalty points will be initially recorded as deferred revenue and subsequently recognized as revenue upon redemption or expiration of the loyalty points. Estimated breakage on unused gift cards and merchandise credit liabilities is currently recognized on a quarterly basis (recorded to cost of sales) for balances older than two years to the extent that we believe the likelihood of redemption is remote. Under the new standards, we will recognize breakage in revenue based on and in proportion to historical redemption patterns, regardless of the age of the unused gift cards and merchandise credit liabilities. Significant items yet to be finalized in our implementation efforts include quantification of the cumulative-effect adjustments to be recorded upon adoption, which we do not expect to be material; our ongoing evaluation of changes to business processes and related controls; and the impact of the new revenue-related disclosure requirements to our consolidated financial statements.

In March 2016, the FASB issued ASU 2016-04, Recognition of Breakage for Certain Prepaid Stored-Value Products. The standard specifies how prepaid stored-value product liabilities should be derecognized, thereby eliminating the current and potential future diversity in practice. Consistent with ASU 2014-09 related to revenue recognition, the standard requires derecognition in proportion with the rights expected to be exercised by the holder. Entities may adopt this standard using either a modified retrospective transition approach with a cumulative-effect adjustment to retained earnings or a full retrospective transition approach. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2017, with early adoption permitted. We continue to evaluate the impact that this standard will have on our consolidated financial statements and footnote disclosures.

In February 2016, the FASB issued ASU 2016-02, Leases. The standard requires a lessee to recognize a liability related to lease payments and an offsetting right-of-use asset representing a right to use the underlying asset for the lease term on the balance sheet. Entities are required to use a modified retrospective transition approach for leases that exist or are entered into after the beginning of the earliest comparative period presented in the financial statements, with certain reliefs available. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018, with early adoption permitted. We are currently evaluating the overall impact to our consolidated financial statements, though we expect the adoption to result in a material increase in the assets and liabilities reflected in our consolidated balance sheets.