v3.26.1
Business Combinations - Schedule of the Purchase Price Allocation (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2026
INR (₨)
Mar. 31, 2026
USD ($)
Dec. 01, 2025
INR (₨)
Mar. 31, 2025
INR (₨)
Mar. 31, 2024
INR (₨)
Disclosure of detailed information about business combination [line items]          
Goodwill ₨ 387,399 $ 4,129   ₨ 325,014 ₨ 316,002
Aggne [Member]          
Disclosure of detailed information about business combination [line items]          
Net assets         194
Fair value of property, plant and equipment         374
Fair value of right-of-use assets         33
Fair value of customer-related intangibles         556
Fair value of marketing-related intangibles         390
Deferred tax liabilities on intangible assets         (367)
Total identifiable assets         1,180
Goodwill         4,817
Share of non-controlling interests         (472)
Total purchase price         5,525
Cash and cash equivalents         153
Fair value of acquired trade receivables included in net assets         113
Gross contractual amount of acquired trade receivables         113
Less: Allowance for lifetime expected credit loss         0
Transaction costs         ₨ 31
AVT [Member]          
Disclosure of detailed information about business combination [line items]          
Net assets       166  
Fair value of property, plant and equipment       9  
Fair value of customer-related intangibles       1,896  
Deferred tax liabilities on intangible assets       (566)  
Total identifiable assets       1,505  
Goodwill       1,331  
Total purchase price       2,836  
Cash and cash equivalents       113  
Fair value of acquired trade receivables included in net assets       215  
Gross contractual amount of acquired trade receivables       215  
Less: Allowance for lifetime expected credit loss       0  
Transaction costs       ₨ 45  
Harman - Digital Transformation Solutions (DTS) [Member]          
Disclosure of detailed information about business combination [line items]          
Net assets 2,996        
Fair value of property, plant and equipment 383        
Fair value of right-of-use assets 1,062        
Fair value of customer-related intangibles 5,644        
Fair value of marketing-related intangibles 1,109        
Deferred tax liabilities on intangible assets (1,915)        
Total identifiable assets 9,279        
Goodwill 24,765        
Total purchase price 34,044   ₨ 34,044    
Cash and cash equivalents 8,011        
Fair value of acquired trade receivables included in net assets 3,066        
Gross contractual amount of acquired trade receivables 3,225        
Less: Allowance for lifetime expected credit loss (159)        
Transaction costs ₨ 230