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Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 28, 2013
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
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 Common Stock, Shares Outstanding		230,183,725

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