v3.26.1
Property, Plant and Equipment - Schedule of Changes in Carrying Value of Property, Plant and Equipment (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance $ 1,497 $ 1,537 $ 1,679  
Capital work-in-progress 72 119 54 $ 55
Property, plant and equipment, Ending balance 1,406 1,497 1,537  
Gross Carrying Value        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 3,656 3,663 3,658  
Additions 323 217 212  
Additions- Business Combinations (Refer to Note 2.10) 1 5    
Deletions** (185) (144) (148)  
Translation difference (333) (85) (59)  
Property, plant and equipment, Ending balance 3,462 3,656 3,663  
Accumulated Depreciation        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance (2,278) (2,180) (2,034)  
Deletions** 174 128 145  
Depreciation (239) (279) (324)  
Translation difference 215 53 33  
Property, plant and equipment, Ending balance (2,128) (2,278) (2,180)  
Land        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 173 171 174  
Property, plant and equipment, Ending balance 152 173 171  
Land | Gross Carrying Value        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 173 171 174  
Additions 3 6    
Deletions** (7)      
Translation difference (17) (4) (3)  
Property, plant and equipment, Ending balance 152 173 171  
Buildings        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 744 821 855  
Property, plant and equipment, Ending balance 708 744 821  
Buildings | Gross Carrying Value        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 1,371 1,411 1,407  
Additions 77 5 36  
Deletions** (1) (13) (7)  
Translation difference (121) (32) (25)  
Property, plant and equipment, Ending balance 1,326 1,371 1,411  
Buildings | Accumulated Depreciation        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance (627) (590) (552)  
Deletions**   2 7  
Depreciation (51) (52) (54)  
Translation difference 60 13 9  
Property, plant and equipment, Ending balance (618) (627) (590)  
Plant and Machinery        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 121 139 157  
Property, plant and equipment, Ending balance 118 121 139  
Plant and Machinery | Gross Carrying Value        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 632 637 625  
Additions 47 30 40  
Additions- Business Combinations (Refer to Note 2.10)   1    
Deletions** (11) (20) (19)  
Translation difference (64) (16) (9)  
Property, plant and equipment, Ending balance 604 632 637  
Plant and Machinery | Accumulated Depreciation        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance (511) (498) (468)  
Deletions** 10 18 18  
Depreciation (39) (44) (56)  
Translation difference 54 13 8  
Property, plant and equipment, Ending balance (486) (511) (498)  
Computer Equipment        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 268 267 328  
Property, plant and equipment, Ending balance 291 268 267  
Computer Equipment | Gross Carrying Value        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 1,088 1,032 1,037  
Additions 170 154 112  
Additions- Business Combinations (Refer to Note 2.10) 1 1    
Deletions** (147) (75) (102)  
Translation difference (100) (24) (15)  
Property, plant and equipment, Ending balance 1,012 1,088 1,032  
Computer Equipment | Accumulated Depreciation        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance (820) (765) (709)  
Deletions** 145 73 101  
Depreciation (122) (148) (167)  
Translation difference 76 20 10  
Property, plant and equipment, Ending balance (721) (820) (765)  
Furniture and Fixtures        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 71 84 109  
Property, plant and equipment, Ending balance 64 71 84  
Furniture and Fixtures | Gross Carrying Value        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 386 406 409  
Additions 26 22 24  
Additions- Business Combinations (Refer to Note 2.10)   3    
Deletions** (18) (36) (20)  
Translation difference (31) (9) (7)  
Property, plant and equipment, Ending balance 363 386 406  
Furniture and Fixtures | Accumulated Depreciation        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance (315) (322) (300)  
Deletions** 18 35 19  
Depreciation (27) (35) (47)  
Translation difference 25 7 6  
Property, plant and equipment, Ending balance (299) (315) (322)  
Vehicles        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 1 1 1  
Property, plant and equipment, Ending balance 1 1 1  
Vehicles | Gross Carrying Value        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance 6 6 6  
Deletions** (1)      
Property, plant and equipment, Ending balance 5 6 6  
Vehicles | Accumulated Depreciation        
Disclosure Of Property Plant And Equipment [Line Items]        
Property, plant and equipment, Beginning balance (5) (5) (5)  
Deletions** 1      
Property, plant and equipment, Ending balance $ (4) $ (5) $ (5)