v3.26.1
Goodwill And Intangible Assets - Summary of Changes In Carrying Amount of Acquired Intangible Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance $ 323 $ 167 $ 213
Intangible assets gross, Ending balance 298 323 167
Gross Carrying Value      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance 822 574 570
Additions during the period 19 17 9
Acquisition through business combination (Refer Note 2.10) 35 232  
Translation differences 34 (1) (5)
Intangible assets gross, Ending balance 910 822 574
Accumulated Depreciation      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance (499) (407) (357)
Amortization expense (101) (91) (52)
Translation differences (12) (1) 2
Intangible assets gross, Ending balance (612) (499) (407)
Customer related      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance 235 85 111
Intangible assets gross, Ending balance $ 204 $ 235 $ 85
Customer related | Bottom of Range      
Disclosure Of Intangible Assets [Line Items]      
Estimated Useful Life (in years) 1 year 1 year 1 year
Estimated Remaining Useful Life (in years) 1 year 1 year 1 year
Customer related | Top of Range      
Disclosure Of Intangible Assets [Line Items]      
Estimated Useful Life (in years) 15 years 15 years 15 years
Estimated Remaining Useful Life (in years) 9 years 9 years 10 years
Customer related | Gross Carrying Value      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance $ 516 $ 304 $ 307
Acquisition through business combination (Refer Note 2.10) 26 212  
Translation differences 25   (3)
Intangible assets gross, Ending balance 567 516 304
Customer related | Accumulated Depreciation      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance (281) (219) (196)
Amortization expense (71) (62) (24)
Translation differences (11)   1
Intangible assets gross, Ending balance (363) (281) (219)
Software related      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance 48 41 42
Intangible assets gross, Ending balance $ 58 $ 48 $ 41
Software related | Bottom of Range      
Disclosure Of Intangible Assets [Line Items]      
Estimated Useful Life (in years) 3 years 3 years 3 years
Estimated Remaining Useful Life (in years) 1 year 1 year 1 year
Software related | Top of Range      
Disclosure Of Intangible Assets [Line Items]      
Estimated Useful Life (in years) 10 years 10 years 10 years
Estimated Remaining Useful Life (in years) 4 years 4 years 5 years
Software related | Gross Carrying Value      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance $ 151 $ 134 $ 127
Additions during the period 19 17 9
Translation differences 6   (2)
Intangible assets gross, Ending balance 176 151 134
Software related | Accumulated Depreciation      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance (103) (93) (85)
Amortization expense (14) (10) (9)
Translation differences (1)   1
Intangible assets gross, Ending balance (118) (103) (93)
Marketing Related      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance 26 14 18
Intangible assets gross, Ending balance $ 23 $ 26 $ 14
Marketing Related | Bottom of Range      
Disclosure Of Intangible Assets [Line Items]      
Estimated Useful Life (in years) 3 years 3 years 3 years
Estimated Remaining Useful Life (in years) 1 year 1 year 1 year
Marketing Related | Top of Range      
Disclosure Of Intangible Assets [Line Items]      
Estimated Useful Life (in years) 10 years 10 years 10 years
Estimated Remaining Useful Life (in years) 5 years 6 years 6 years
Marketing Related | Gross Carrying Value      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance $ 61 $ 42 $ 42
Acquisition through business combination (Refer Note 2.10) 2 20  
Translation differences 2 (1)  
Intangible assets gross, Ending balance 65 61 42
Marketing Related | Accumulated Depreciation      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance (35) (28) (24)
Amortization expense (7) (6) (4)
Translation differences   (1)  
Intangible assets gross, Ending balance (42) (35) (28)
Others      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance 14 27 42
Intangible assets gross, Ending balance $ 13 $ 14 $ 27
Others | Bottom of Range      
Disclosure Of Intangible Assets [Line Items]      
Estimated Useful Life (in years) 3 years 3 years 3 years
Estimated Remaining Useful Life (in years) 1 year 1 year 1 year
Others | Top of Range      
Disclosure Of Intangible Assets [Line Items]      
Estimated Useful Life (in years) 7 years 7 years 7 years
Estimated Remaining Useful Life (in years) 2 years 3 years 4 years
Others | Gross Carrying Value      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance $ 94 $ 94 $ 94
Acquisition through business combination (Refer Note 2.10) 7    
Translation differences 1    
Intangible assets gross, Ending balance 102 94 94
Others | Accumulated Depreciation      
Disclosure Of Intangible Assets [Line Items]      
Intangible assets gross, Beginning balance (80) (67) (52)
Amortization expense (9) (13) (15)
Intangible assets gross, Ending balance $ (89) $ (80) $ (67)