v2.4.0.6
Document and Entity Information (USD $)
3 Months Ended
Mar. 31, 2011
Apr. 28, 2011
Document and Entity Information [Abstract]    
Entity Registrant Name IDEX CORP /DE/  
Entity Central Index Key 0000832101  
Document Type 10-Q  
Document Period End Date Mar. 31, 2011  
Amendment Flag false  
Document Fiscal Year Focus 2011  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Public Float $ 2,292,832,953  
Entity Common Stock, Shares Outstanding   82,881,231