Revenue from Operations - Summary of Disaggregated Revenues From Contracts with Customers (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Disclosure Of Disaggregated Revenues from Contracts with Customers by Geography, Offerings and Contract Type [Line Items] | |||
| Revenues | $ 20,158 | $ 19,277 | $ 18,562 |
| North America | |||
| Disclosure Of Disaggregated Revenues from Contracts with Customers by Geography, Offerings and Contract Type [Line Items] | |||
| Revenues | 11,304 | 11,166 | 11,163 |
| Europe | |||
| Disclosure Of Disaggregated Revenues from Contracts with Customers by Geography, Offerings and Contract Type [Line Items] | |||
| Revenues | 6,480 | 5,745 | 5,105 |
| INDIA | |||
| Disclosure Of Disaggregated Revenues from Contracts with Customers by Geography, Offerings and Contract Type [Line Items] | |||
| Revenues | 576 | 593 | 469 |
| Rest of the World | |||
| Disclosure Of Disaggregated Revenues from Contracts with Customers by Geography, Offerings and Contract Type [Line Items] | |||
| Revenues | $ 1,798 | $ 1,773 | $ 1,825 |