v3.19.2
Cover Page - shares
6 Months Ended
Jun. 30, 2019
Jul. 23, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2019  
Document Transition Report false  
Entity File Number 1-10235  
Entity Registrant Name IDEX CORP /DE/  
Entity Central Index Key 0000832101  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 36-3555336  
Entity Address, Address Line One 1925 West Field Court,  
Entity Address, Address Line Two Suite 200,  
Entity Address, City or Town Lake Forest,  
Entity Address, State or Province IL  
Entity Address, Postal Zip Code 60045  
City Area Code 847  
Local Phone Number 498-7070  
Title of 12(b) Security Common Stock, par value $.01 per share  
Trading Symbol IEX  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   75,847,167