Expenses by nature - Additional Information (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Nov. 21, 2025 |
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Expenses by nature [abstract] | ||||
| Employee benefits expense | $ (10,882) | $ (10,165) | $ (9,981) | |
| Increase in employee benefits expense | $ 143 | |||
| X | ||||||||||
- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The increase (decrease) in the net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|