v3.26.1
Property, plant and equipment - Summary of Property, plant and equipment (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 detailed information about property, plant and equipment [line items]        
Property, plant and equipment ₨ 747,066   ₨ 678,600  
Charge for the year 23,503 $ 250 18,941 ₨ 15,628
Property, plant and equipment 809,882 8,631 747,066 678,600
Cost        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 846,856   759,854 605,021
Additions during the year 125,990   102,944 182,648
Acquisition through business combination 82      
Disposals and adjustments during the year (41,680)   (15,942) (27,815)
Exchange differences 8      
Property, plant and equipment 931,256   846,856 759,854
Accumulated depreciation        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 99,789   81,254 66,666
Charge for the year 23,503   18,941 15,628
Depreciation capitalised during the year 427   570 369
Disposals and adjustments during the year (2,345)     (1,409)
Disposals during the year     (976)  
Property, plant and equipment 121,374   99,789 81,254
Freehold Land        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 14,309   14,225  
Property, plant and equipment 14,623 156 14,309 14,225
Freehold Land | Cost        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 14,309   14,225 13,881
Additions during the year 370   273 597
Disposals and adjustments during the year (56)   (189) (253)
Property, plant and equipment 14,623   14,309 14,225
Plant and equipment        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 585,536   503,441  
Property, plant and equipment 671,052 7,152 585,536 503,441
Plant and equipment | Cost        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 684,532   584,123 476,679
Additions during the year 1,103   857 9,579
Acquisition through business combination 49      
Disposals and adjustments during the year (40,049)   (15,710) (27,544)
Transfer/Capitalised during the year 145,651   115,262 125,409
Exchange differences 5      
Property, plant and equipment 791,291   684,532 584,123
Plant and equipment | Accumulated depreciation        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 98,996   80,682 66,270
Charge for the year 23,434   18,860 15,526
Depreciation capitalised during the year 127   407 283
Disposals and adjustments during the year (2,318)     (1,397)
Disposals during the year     (953)  
Property, plant and equipment 120,239   98,996 80,682
Building        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 4,713   1,317  
Property, plant and equipment 4,764 51 4,713 1,317
Building | Cost        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 4,869   1,401 130
Transfer/Capitalised during the year 222   3,468 1,271
Property, plant and equipment 5,091   4,869 1,401
Building | Accumulated depreciation        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 156   84 37
Charge for the year 13   16 15
Depreciation capitalised during the year 158   56 32
Property, plant and equipment 327   156 84
Leasehold improvements        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 13   18  
Property, plant and equipment 39 0 13 18
Leasehold improvements | Cost        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 149   149 143
Additions during the year 35     6
Disposals and adjustments during the year (3)      
Property, plant and equipment 181   149 149
Leasehold improvements | Accumulated depreciation        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 136   131 125
Charge for the year 3   2 4
Depreciation capitalised during the year 6   3 2
Disposals and adjustments during the year (3)      
Property, plant and equipment 142   136 131
Office equipments        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 80   88  
Property, plant and equipment 130 1 80 88
Office equipments | Cost        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 185   176 113
Additions during the year 84   26 69
Acquisition through business combination 12      
Disposals and adjustments during the year (11)   (17) (6)
Exchange differences 1      
Property, plant and equipment 271   185 176
Office equipments | Accumulated depreciation        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 105   88 69
Charge for the year 14   11 17
Depreciation capitalised during the year 22   14 6
Disposals and adjustments during the year       (4)
Disposals during the year     (8)  
Property, plant and equipment 141   105 88
Furniture and fixtures        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 87   75  
Property, plant and equipment 137 1 87 75
Furniture and fixtures | Cost        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 153   129 91
Additions during the year 58   26 40
Acquisition through business combination 12      
Disposals and adjustments during the year (3)   (2) (2)
Exchange differences 1      
Property, plant and equipment 221   153 129
Furniture and fixtures | Accumulated depreciation        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 66   54 44
Charge for the year 13   9 8
Depreciation capitalised during the year 6   4 2
Disposals and adjustments during the year (1)      
Disposals during the year     (1)  
Property, plant and equipment 84   66 54
Computers        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 288   271  
Property, plant and equipment 189 2 288 271
Computers | Cost        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 618   486 261
Additions during the year 37   156 235
Acquisition through business combination 9      
Disposals and adjustments during the year (35)   (24) (10)
Exchange differences 1      
Property, plant and equipment 630   618 486
Computers | Accumulated depreciation        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 330   215 121
Charge for the year 26   43 58
Depreciation capitalised during the year 108   86 44
Disposals and adjustments during the year (23)     (8)
Disposals during the year     (14)  
Property, plant and equipment 441   330 215
Capital work in progress        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 142,040   159,165  
Property, plant and equipment 118,948 $ 1,268 142,040 159,165
Capital work in progress | Cost        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 142,040   159,165 113,723
Additions during the year 124,303   101,606 172,122
Disposals and adjustments during the year (1,523)      
Transfer/Capitalised during the year (145,873)   (118,730) (126,680)
Property, plant and equipment ₨ 118,948   ₨ 142,040 ₨ 159,165