Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
2021-04-01 to 2022-03-31 |
2020-04-01 to 2021-03-31 |
|---|---|---|
| Statement of changes in net assets available for benefits [abstract] | ||
| Reconciliation of changes in net assets available for benefits [abstract] | ||
| Changes in net assets available for benefits [abstract] | ||
| Other income |
10,000,000
USD
|
11,000,000
USD
|
| Tax expense (income) |
469,000,000
USD
|
282,000,000
USD
|