v3.26.1
Segment Information - Summary of Information on Reportable Segments (Detail)
₨ in Millions, $ in Millions
 12 Months Ended
Mar. 31, 2026
INR (₨)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
INR (₨)
Mar. 31, 2024
INR (₨)
Disclosure of operating segments [line items]        
Revenue ₨ 926,240 $ 9,871 ₨ 890,884 ₨ 897,603
Results from operating activities 151,251 1,612 151,271 136,099
Finance expense (14,577) (156) (14,770) (12,552)
Finance and other income 36,491 389 38,202 23,896
Share of net profit/(loss) of associate accounted for using the equity method 257 3 254 (233)
Profit before tax 173,422 1,848 174,957 147,210
Income tax expense (40,767) (434) (42,777) (36,089)
Profit for the year 132,655 $ 1,414 132,180 111,121
Information Technology Services [member]        
Disclosure of operating segments [line items]        
Revenue 921,153   888,224 893,816
Segment result 162,072   161,796 164,500
Unallocated (3,426)   (10,157) (20,304)
Results from operating activities 158,646   151,639 144,196
Information Technology Services [member] | Americas 1 [member]        
Disclosure of operating segments [line items]        
Revenue 305,571   281,824 268,230
Segment result 62,896   58,186 59,364
Information Technology Services [member] | Americas 2 [member]        
Disclosure of operating segments [line items]        
Revenue 269,077   271,972 269,482
Segment result 53,138   61,326 59,163
Information Technology Services [member] | Europe [member]        
Disclosure of operating segments [line items]        
Revenue 244,165   240,077 253,927
Segment result 31,083   29,434 33,354
Information Technology Services [member] | Asia Pacific Middle East Africa [member]        
Disclosure of operating segments [line items]        
Revenue 102,340   94,351 102,177
Segment result 14,955   12,850 12,619
Information Technology Products [member]        
Disclosure of operating segments [line items]        
Revenue 6,940   2,692 4,127
Segment result 559   (173) (371)
Results from operating activities 559   (173) (371)
Operating Segments [member]        
Disclosure of operating segments [line items]        
Revenue 928,093   890,916 897,943
Segment result 154,677   161,428 156,403
Unallocated (3,426)   (10,157) (20,304)
Results from operating activities 151,251   151,271 136,099
Finance expense (14,577)   (14,770) (12,552)
Finance and other income 36,491   38,202 23,896
Share of net profit/(loss) of associate accounted for using the equity method 257   254 (233)
Profit before tax 173,422   174,957 147,210
Income tax expense (40,767)   (42,777) (36,089)
Profit for the year 132,655   132,180 111,121
Depreciation, amortization and impairment 29,107   29,579 34,071
Material Reconciling Items [member]        
Disclosure of operating segments [line items]        
Segment result (7,954)   (195) (7,726)
Results from operating activities ₨ (7,954)   ₨ (195) ₨ (7,726)