Property, Plant and Equipment - Schedule of Changes in Carrying Value of Property, Plant and Equipment (Parenthetical) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Reconciliation of changes in property, plant and equipment [abstract] | |||
| Gross book value of assets retired | $ 60 | $ 93 | $ 234 |