Basis of Presentation	3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements of Systemax Inc., with its subsidiaries, (the "Company") are unaudited and have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America are not required in these interim financial statements and have been condensed or omitted. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain prior year amounts were reclassified to conform to current year presentation. As previously disclosed, in August 2018 the Company sold its France-based IT business. With the completion of the sale, Systemax operates and is internally managed in one reportable business segment, its Industrial Products Group (“IPG”), which includes its former Corporate and other segment. IPG focuses on industrial supplies and MRO (maintenance, repair and operations) markets the Company has served since 1949. The sale of the France based IT business, which had been included in the Company's former European Technology Products segment, met the “strategic shift with major impact” criteria as defined under Accounting Standards Update ("ASU") 2014-08, "Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity". Therefore, the prior year results of the France-based IT business are included in discontinued operations in the accompanying consolidated financial statements. For the three months ended March 31, 2018, net sales and net income of the France business included in discontinued operations totaled $143.0 million and $5.5 million, respectively. As previously disclosed, in March 2017 the Company sold Systemax Europe SARL and its subsidiaries (the “SARL Businesses”) which had been included in the Company's former European Technology Products segment. The sale of the SARL Businesses met the “strategic shift with major impact” criteria as described above. For the three months ended March 31, 2019 and 2018, there were no net sales of the SARL Businesses included in discontinued operations. For the three months ended March 31, 2019, there was no activity related to the SARL Businesses in net income/loss and for the three months ended March 31, 2018, net loss of $0.2 million was included in discontinued operations. Also included in discontinued operations is the Company’s former North American Technology Group ("NATG") business, which was sold in December 2015 and is winding down its operations. The sale of the NATG business had a major impact on the Company and therefore certain components met the strategic shift criteria as defined under ASU 2014-08. Accordingly, these components and any related results of operations are reflected in discontinued operations. For the three months ended March 31, 2019 and 2018, there were no net sales of the NATG business included in discontinued operations. Net loss from the NATG business was $0.3 million for the three months ended March 31, 2019 and net income from the NATG business was $0.6 million for the three months ended March 31, 2018. In the opinion of management, the accompanying condensed consolidated financial statements contain all normal and recurring adjustments necessary to present fairly the financial position of the Company as of March 31, 2019 and the results of operations for the three month periods ended March 31, 2019 and 2018, statements of comprehensive income (loss) for the three month periods ended March 31, 2019 and 2018, cash flows for the three month periods ended March 31, 2019 and 2018 and changes in shareholders’ equity for the three month period ended March 31, 2019 and 2018. The December 31, 2018 Condensed Consolidated Balance Sheet has been derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements as of December 31, 2018 and for the year then ended included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018. The results for the three month period ended March 31, 2019 are not necessarily indicative of the results for the entire year. Systemax manages its business and reports using a 52-53 week fiscal year that ends at midnight on the Saturday closest to December 31. For clarity of presentation herein, fiscal years and quarters are referred to as if they ended on the traditional calendar month. The actual fiscal first quarter ended on March 30, 2019 and March 31, 2018. The first quarters of both 2019 and 2018 included 13 weeks. Recent Accounting Pronouncements Public companies in the United States are subject to the accounting and reporting requirements of various authorities, including the Financial Accounting Standards Board (“FASB”) and the Securities and Exchange Commission (“SEC”). These authorities issue numerous pronouncements, most of which are not applicable to the Company’s current or reasonably foreseeable operating structure. In June 2018, the FASB issued ASU 2018-07, Improvements to Nonemployee Share-Based Payment Accounting, which simplifies the accounting for share-based payments to nonemployees by aligning it with the accounting for share-based payments to employees, with certain exceptions. This ASU is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year, with early adoption permitted after adoption of ASU 2014-09. The Company adopted this standard beginning January 1, 2019 and its adoption did not materially impact the Company's consolidated financial position or results of operations. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurements, which eliminates, adds or modifies certain disclosure requirements for fair value measurements. Entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year, with early adoption permitted to adopt either the entire standard or only the provisions that eliminate or modify the requirements. The Company is evaluating the effect of adopting this pronouncement. In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in Accounting Standards Codification 350-40 to determine which implementation costs to defer and recognize as an asset. This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year, with early adoption permitted, including adoption in any interim period. The Company is evaluating the effect of adopting this pronouncement. In June 2016, the FASB ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments as modified by subsequently issued ASU 2018-19. This ASU requires estimating credit losses for certain financial instruments, including trade receivables, held at the reporting date based on historical experience, current conditions and reasonable forecasts. This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year. The Company is evaluating the effect of adopting this pronouncement.

Basis of Presentation

The accompanying condensed consolidated financial statements of Systemax Inc., with its subsidiaries, (the "Company") are unaudited and have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America are not required in these interim financial statements and have been condensed or omitted. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain prior year amounts were reclassified to conform to current year presentation.

As previously disclosed, in August 2018 the Company sold its France-based IT business. With the completion of the sale, Systemax operates and is internally managed in one reportable business segment, its Industrial Products Group (“IPG”), which includes its former Corporate and other segment. IPG focuses on industrial supplies and MRO (maintenance, repair and operations) markets the Company has served since 1949.

The sale of the France based IT business, which had been included in the Company's former European Technology Products segment, met the “strategic shift with major impact” criteria as defined under Accounting Standards Update ("ASU") 2014-08, "Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity". Therefore, the prior year results of the France-based IT business are included in discontinued operations in the accompanying consolidated financial statements. For the three months ended March 31, 2018, net sales and net income of the France business included in discontinued operations totaled $143.0 million and $5.5 million, respectively.

As previously disclosed, in March 2017 the Company sold Systemax Europe SARL and its subsidiaries (the “SARL Businesses”) which had been included in the Company's former European Technology Products segment. The sale of the SARL Businesses met the “strategic shift with major impact” criteria as described above. For the three months ended March 31, 2019 and 2018, there were no net sales of the SARL Businesses included in discontinued operations. For the three months ended March 31, 2019, there was no activity related to the SARL Businesses in net income/loss and for the three months ended March 31, 2018, net loss of $0.2 million was included in discontinued operations.

Also included in discontinued operations is the Company’s former North American Technology Group ("NATG") business, which was sold in December 2015 and is winding down its operations. The sale of the NATG business had a major impact on the Company and therefore certain components met the strategic shift criteria as defined under ASU 2014-08. Accordingly, these components and any related results of operations are reflected in discontinued operations. For the three months ended March 31, 2019 and 2018, there were no net sales of the NATG business included in discontinued operations. Net loss from the NATG business was $0.3 million for the three months ended March 31, 2019 and net income from the NATG business was $0.6 million for the three months ended March 31, 2018.

In the opinion of management, the accompanying condensed consolidated financial statements contain all normal and recurring adjustments necessary to present fairly the financial position of the Company as of March 31, 2019 and the results of operations for the three month periods ended March 31, 2019 and 2018, statements of comprehensive income (loss) for the three month periods ended March 31, 2019 and 2018, cash flows for the three month periods ended March 31, 2019 and 2018 and changes in shareholders’ equity for the three month period ended March 31, 2019 and 2018. The December 31, 2018 Condensed Consolidated Balance Sheet has been derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018.

These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements as of December 31, 2018 and for the year then ended included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018. The results for the three month period ended March 31, 2019 are not necessarily indicative of the results for the entire year.

Systemax manages its business and reports using a 52-53 week fiscal year that ends at midnight on the Saturday closest to December 31. For clarity of presentation herein, fiscal years and quarters are referred to as if they ended on the traditional calendar month. The actual fiscal first quarter ended on March 30, 2019 and March 31, 2018. The first quarters of both 2019 and 2018 included 13 weeks.

Recent Accounting Pronouncements

Public companies in the United States are subject to the accounting and reporting requirements of various authorities, including the Financial Accounting Standards Board (“FASB”) and the Securities and Exchange Commission (“SEC”). These authorities issue numerous pronouncements, most of which are not applicable to the Company’s current or reasonably foreseeable operating structure.

In June 2018, the FASB issued ASU 2018-07, Improvements to Nonemployee Share-Based Payment Accounting, which simplifies the accounting for share-based payments to nonemployees by aligning it with the accounting for share-based payments to employees, with certain exceptions. This ASU is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year, with early adoption permitted after adoption of ASU 2014-09. The Company adopted this standard beginning January 1, 2019 and its adoption did not materially impact the Company's consolidated financial position or results of operations.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurements, which eliminates, adds or modifies certain disclosure requirements for fair value measurements. Entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year, with early adoption permitted to adopt either the entire standard or only the provisions that eliminate or modify the requirements. The Company is evaluating the effect of adopting this pronouncement.

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in Accounting Standards Codification 350-40 to determine which implementation costs to defer and recognize as an asset. This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year, with early adoption permitted, including adoption in any interim period. The Company is evaluating the effect of adopting this pronouncement.

In June 2016, the FASB ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments as modified by subsequently issued ASU 2018-19. This ASU requires estimating credit losses for certain financial instruments, including trade receivables, held at the reporting date based on historical experience, current conditions and reasonable forecasts. This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year. The Company is evaluating the effect of adopting this pronouncement.