Document and Entity Information (USD $)	6 Months Ended
	Jun. 30, 2012	Aug. 01, 2012	Dec. 31, 2011
Document and Entity Information [Abstract]
Entity Registrant Name	Systemax Inc.
Entity Central Index Key	0000945114
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		36,530,972
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2012
Entity Public Float			$ 164,511,601