v3.19.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2019
May 02, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Trading Symbol G  
Entity Registrant Name GENPACT LTD  
Entity Central Index Key 0001398659  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   189,973,506