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Business Combination - Additional Information (Detail)
€ in Millions, ₨ in Millions
12 Months Ended
Nov. 23, 2016
INR (₨)
Feb. 29, 2016
INR (₨)
Feb. 09, 2016
Jan. 05, 2016
INR (₨)
Aug. 06, 2015
INR (₨)
Mar. 31, 2018
INR (₨)
Acquisition
Mar. 31, 2017
INR (₨)
Mar. 31, 2016
USD ($)
Mar. 31, 2018
USD ($)
Nov. 23, 2016
USD ($)
Mar. 31, 2016
INR (₨)
Feb. 29, 2016
USD ($)
Jan. 05, 2016
EUR (€)
Aug. 06, 2015
EUR (€)
Disclosure of detailed information about business combination [line items]                            
Goodwill           ₨ 117,584.0 ₨ 125,796.0   $ 1,806,000,000   ₨ 101,991.0      
Designit AS [member]                            
Disclosure of detailed information about business combination [line items]                            
Acquisition date         Aug. 06, 2015                  
Acquired percentage         100.00%                 100.00%
Total consideration include earn out         ₨ 6,501.0                 € 93.0
Deferred earn-out amount         ₨ 2,108.0                 € 30.0
Deferred earn-out amount, period         3 years                  
Deferred earn-out amount, discount rate         13.00%                  
Deferred earn-out amount liability fair value         ₨ 1,287.0   293.0              
Cash and cash equivalents acquired         359.0                  
Trade receivables acquired         392.0                  
Goodwill         4,046.0                  
Earn-out payment           97.0 83.0              
Net gain (loss) recorded           192.0 1,032.0              
Total consideration         ₨ 5,680.0                  
Cellent AG [member]                            
Disclosure of detailed information about business combination [line items]                            
Acquisition date       Jan. 05, 2016                    
Acquired percentage       100.00%                 100.00%  
Cash and cash equivalents acquired       ₨ 367.0                    
Trade receivables acquired       1,437.0                    
Goodwill       3,913.0                    
Total consideration       ₨ 5,686.0                 € 78.8  
Working capital adjustments             114.0              
HPH Holdings Corp [member]                            
Disclosure of detailed information about business combination [line items]                            
Acquisition date     Feb. 29, 2016                      
Total consideration include earn out   ₨ 30,850.0                   $ 450,900,000    
Deferred earn-out amount   ₨ 1,115.0                   16,300,000    
Deferred earn-out amount, period   3 years                        
Deferred earn-out amount, discount rate   14.10%                        
Deferred earn-out amount liability fair value   ₨ 536.0         65.0         $ 7,800,000    
Cash and cash equivalents acquired   47.0                        
Trade receivables acquired   2,472.0                        
Goodwill   22,590.0                        
Earn-out payment           66.0                
Net gain (loss) recorded             (1,351.0)              
Working capital adjustments   ₨ 219.0                        
Revenue of combined entity as if combination occurred at beginning of period | $               $ 526,671            
Profit (loss) of combined entity as if combination occurred at beginning of period | $               $ 88,314            
Appirio Inc [member]                            
Disclosure of detailed information about business combination [line items]                            
Acquisition date Nov. 23, 2016                          
Cash and cash equivalents acquired ₨ 85.0                          
Trade receivables acquired 2,363.0                          
Goodwill 28,020.0                          
Total consideration ₨ 32,402.0                 $ 475,700,000        
Revenue of combined entity as if combination occurred at beginning of period             559,575.0              
Profit (loss) of combined entity as if combination occurred at beginning of period             ₨ 85,424.0              
Material acquisitions [member]                            
Disclosure of detailed information about business combination [line items]                            
Cash and cash equivalents acquired           58.0                
Trade receivables acquired           215.0                
Goodwill           1,185.0                
Total consideration           ₨ 6,924.0                
Number of business combination completed | Acquisition           4