v3.25.2
Segment Reporting - Schedule of Segmented Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure of Operating Segments [Line Items]      
Revenues $ 19,277 $ 18,562 $ 18,212
Identifiable operating expenses 11,237 10,856 10,553
Allocated expenses 3,400 3,307 3,310
Segment profit 4,640 4,399 4,349
Unallocable expenses 569 565 524
Operating profit 4,071 3,834 3,825
Other income, net 425 568 335
Finance cost 49 56 35
Profit before income taxes 4,447 4,346 4,125
Income tax expense 1,285 1,177 1,142
Net profit 3,162 3,169 2,983
Depreciation and amortization 569 565 524
Operating Segments | Financial Services      
Disclosure of Operating Segments [Line Items]      
Revenues 5,342 5,093 5,434
Identifiable operating expenses 3,059 2,993 3,103
Allocated expenses 971 973 985
Segment profit 1,312 1,127 1,346
Operating Segments | Retail      
Disclosure of Operating Segments [Line Items]      
Revenues 2,609 2,719 2,632
Identifiable operating expenses 1,293 1,414 1,352
Allocated expenses 472 473 487
Segment profit 844 832 793
Operating Segments | Communication      
Disclosure of Operating Segments [Line Items]      
Revenues 2,260 2,173 2,246
Identifiable operating expenses 1,469 1,337 1,380
Allocated expenses 396 391 401
Segment profit 395 445 465
Operating Segments | Energy, Utilities, Resources and Services      
Disclosure of Operating Segments [Line Items]      
Revenues 2,568 2,417 2,300
Identifiable operating expenses 1,406 1,309 1,231
Allocated expenses 441 444 430
Segment profit 721 664 639
Operating Segments | Manufacturing      
Disclosure of Operating Segments [Line Items]      
Revenues 2,980 2,696 2,357
Identifiable operating expenses 1,911 1,763 1,551
Allocated expenses 495 423 426
Segment profit 574 510 380
Operating Segments | Hi-Tech      
Disclosure of Operating Segments [Line Items]      
Revenues 1,548 1,498 1,472
Identifiable operating expenses 897 874 864
Allocated expenses 270 245 242
Segment profit 381 379 366
Operating Segments | Life Sciences      
Disclosure of Operating Segments [Line Items]      
Revenues 1,400 1,391 1,251
Identifiable operating expenses 848 811 724
Allocated expenses 237 230 209
Segment profit 315 350 318
Operating Segments | Others      
Disclosure of Operating Segments [Line Items]      
Revenues 570 575 520
Identifiable operating expenses 354 355 348
Allocated expenses 118 128 130
Segment profit $ 98 $ 92 $ 42