v3.24.2.u1
Long-Term Debt - Narrative (Detail) - USD ($)
1 Months Ended 6 Months Ended 12 Months Ended
Aug. 31, 2018
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Mar. 31, 2021
Nov. 30, 2019
Debt Instrument [Line Items]            
Margin over LIBOR (in percentage) 1.375%          
Net debt to EBITDA leverage ratio, covenant line of credit   300.00%        
Interest coverage minimum ratio, covenant line of credit   3        
Long-term debt, amount   $ 1,633,528,000   $ 1,256,962,000    
Term loan            
Debt Instrument [Line Items]            
Debt amortization expense   1,083,000   1,258,000    
Long-term debt, amount   $ 489,167,000   $ 508,867,000    
Principal amount of term loan     $ 6,625,000      
2022 facility | Minimum            
Debt Instrument [Line Items]            
Term SOFR adjustment (in percentage)   0.00%   0.00%    
2022 facility | Maximum            
Debt Instrument [Line Items]            
Term SOFR adjustment (in percentage)   0.10%   0.10%    
2022 facility | Line of credit            
Debt Instrument [Line Items]            
Debt instrument, face amount       $ 650,000,000    
2022 facility | Term loan            
Debt Instrument [Line Items]            
Debt instrument, face amount       $ 530,000,000    
Amended 2015 facility            
Debt Instrument [Line Items]            
Margin over LIBOR (in percentage)       0.20%    
Credit facility, base rate (in percentage)       0.375%    
2019 Senior notes            
Debt Instrument [Line Items]            
Long-term debt, amount   $ 399,754,000   $ 399,464,000    
2019 Senior notes | Genpact Luxembourg S.r.l.            
Debt Instrument [Line Items]            
Debt instrument, face amount           $ 400,000,000
Debt amortization expense   246,000   536,000    
Long-term debt, amount   $ 399,754,000   399,464,000    
Interest rate on senior notes (in percentage)   3.375%       3.375%
Total debt issuance cost           $ 2,937,000
Debt instrument redemption price (in percentage)   100.00%        
Debt repurchase price as percentage of aggregate principal value upon certain change of controls (in percentage)   101.00%        
Maximum increase in downgrade of credit rating of notes to adjust interest rate payable (in percentage)   2.00%        
2021 Senior notes            
Debt Instrument [Line Items]            
Long-term debt, amount   $ 348,931,000   348,631,000    
2021 Senior notes | Genpact Luxembourg S.r.l.            
Debt Instrument [Line Items]            
Debt instrument, face amount         $ 350,000,000  
Debt amortization expense   1,069,000   1,369,000    
Long-term debt, amount   $ 348,931,000   348,631,000    
Interest rate on senior notes (in percentage)   1.75%     1.75%  
Total debt issuance cost         $ 3,032,000  
Maximum increase in downgrade of credit rating of notes to adjust interest rate payable (in percentage)   2.00%        
2024 Senior notes            
Debt Instrument [Line Items]            
Long-term debt, amount   $ 395,676,000   $ 0    
2024 Senior notes | Genpact Luxembourg S.r.l.            
Debt Instrument [Line Items]            
Interest rate on senior notes (in percentage)   6.00%        
2024 Senior notes | Genpact Luxembourg and Genpact USA            
Debt Instrument [Line Items]            
Debt instrument, face amount   $ 400,000,000        
Debt amortization expense   4,324,000        
Long-term debt, amount   $ 395,676,000        
Interest rate on senior notes (in percentage)   6.00%        
Total debt issuance cost   $ 4,395,000