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Business Combination - Schedule of Allocation of Purchase Price in Net Assets Include both Financial and Non Financial Assets (Detail)
€ in Millions, ₨ in Millions, $ in Millions
Mar. 31, 2018
INR (₨)
Mar. 31, 2018
USD ($)
Mar. 31, 2017
INR (₨)
Nov. 23, 2016
INR (₨)
Nov. 23, 2016
USD ($)
Mar. 31, 2016
INR (₨)
Feb. 29, 2016
INR (₨)
Jan. 05, 2016
INR (₨)
Jan. 05, 2016
EUR (€)
Aug. 06, 2015
INR (₨)
Disclosure of detailed information about business combination [line items]                    
Goodwill ₨ 117,584.0 $ 1,806.0 ₨ 125,796.0     ₨ 101,991.0        
Designit AS [member]                    
Disclosure of detailed information about business combination [line items]                    
Net assets                   ₨ 586.0
Customer related intangibles                   597.0
Brand                   638.0
Non-compete agreement                   103.0
Deferred tax liabilities on intangible assets                   (290.0)
Total                   1,634.0
Goodwill                   4,046.0
Total purchase price                   5,680.0
Designit AS [member] | Pre acquisition carrying [member]                    
Disclosure of detailed information about business combination [line items]                    
Net assets                   586.0
Total                   586.0
Designit AS [member] | Fair value adjustments [member]                    
Disclosure of detailed information about business combination [line items]                    
Customer related intangibles                   597.0
Brand                   638.0
Non-compete agreement                   103.0
Deferred tax liabilities on intangible assets                   (290.0)
Total                   ₨ 1,048.0
Cellent AG [member]                    
Disclosure of detailed information about business combination [line items]                    
Net assets               ₨ 846.0    
Customer related intangibles               1,001.0    
Brand               317.0    
Deferred tax liabilities on intangible assets               (391.0)    
Total               1,773.0    
Goodwill               3,913.0    
Total purchase price               5,686.0 € 78.8  
Cellent AG [member] | Pre acquisition carrying [member]                    
Disclosure of detailed information about business combination [line items]                    
Net assets               846.0    
Total               846.0    
Cellent AG [member] | Fair value adjustments [member]                    
Disclosure of detailed information about business combination [line items]                    
Customer related intangibles               1,001.0    
Brand               317.0    
Deferred tax liabilities on intangible assets               (391.0)    
Total               ₨ 927.0    
HPH Holdings Corp [member]                    
Disclosure of detailed information about business combination [line items]                    
Net assets             ₨ 1,640.0      
Technology platform             2,975.0      
Customer related intangibles             5,791.0      
Non-compete agreement             315.0      
Deferred tax liabilities on intangible assets             (3,039.0)      
Total             7,682.0      
Goodwill             22,590.0      
Total purchase price             30,272.0      
HPH Holdings Corp [member] | Pre acquisition carrying [member]                    
Disclosure of detailed information about business combination [line items]                    
Net assets             36.0      
Technology platform             1,087.0      
Total             1,123.0      
HPH Holdings Corp [member] | Fair value adjustments [member]                    
Disclosure of detailed information about business combination [line items]                    
Net assets             1,604.0      
Technology platform             1,888.0      
Customer related intangibles             5,791.0      
Non-compete agreement             315.0      
Deferred tax liabilities on intangible assets             (3,039.0)      
Total             ₨ 6,559.0      
Appirio Inc [member]                    
Disclosure of detailed information about business combination [line items]                    
Net assets       ₨ 497.0            
Technology platform       347.0            
Customer related intangibles       2,323.0            
Brand       3,148.0            
Alliance relationship       858.0            
Deferred tax liabilities on intangible assets       (2,791.0)            
Total       4,382.0            
Goodwill       28,020.0            
Total purchase price       32,402.0 $ 475.7          
Appirio Inc [member] | Pre acquisition carrying [member]                    
Disclosure of detailed information about business combination [line items]                    
Net assets       526.0            
Technology platform       436.0            
Brand       180.0            
Total       1,142.0            
Appirio Inc [member] | Fair value adjustments [member]                    
Disclosure of detailed information about business combination [line items]                    
Net assets       (29.0)            
Technology platform       (89.0)            
Customer related intangibles       2,323.0            
Brand       2,968.0            
Alliance relationship       858.0            
Deferred tax liabilities on intangible assets       (2,791.0)            
Total       ₨ 3,240.0            
Material acquisitions [member]                    
Disclosure of detailed information about business combination [line items]                    
Net assets 5.0                  
Customer related intangibles 5,565.0                  
Other intangible assets 169.0                  
Total 5,739.0                  
Goodwill 1,185.0                  
Total purchase price ₨ 6,924.0