v2.3.0.15
Document and Entity Information (USD $)
In Millions, except Share data
3 Months Ended
Sep. 30, 2011
Nov. 09, 2011
Dec. 31, 2010
Document and Entity Information [Abstract]   
Entity Registrant NameENERGY CONVERSION DEVICES INC  
Entity Central Index Key0000032878  
Document Type10-Q  
Document Period End DateSep. 30, 2011
Amendment Flagfalse  
Document Fiscal Year Focus2012  
Document Fiscal Period FocusQ1  
Current Fiscal Year End Date--06-30  
Entity Well-known Seasoned IssuerNo  
Entity Voluntary FilersNo  
Entity Current Reporting StatusYes  
Entity Filer CategoryAccelerated Filer  
Entity Public Float  $ 244.4
Entity Common Stock, Shares Outstanding 53,276,954