Statement Of Changes In Equity [Abstract]
| Concept |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||
| Equity | — | — | — | — |
18,064,000,000
USD
|
3,969,000,000
USD
|
96,000,000
USD
|
1,780,000,000
USD
|
20,157,000,000
USD
|
— |
4,007,000,000
USD
|
38,000,000
USD
|
19,207,000,000
USD
|
17,978,000,000
USD
|
3,119,000,000
USD
|
96,000,000
USD
|
1,756,000,000
USD
|
38,000,000
USD
|
3,081,000,000
USD
|
— | — | — | — | — |
6,000,000
USD
|
2,275,000,000
USD
|
18,826,000,000
USD
|
2,281,000,000
USD
|
18,221,000,000
USD
|
1,574,000,000
USD
|
96,000,000
USD
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||
| Profit (loss) |
1,165,000,000
USD
|
2,000,000
USD
|
1,165,000,000
USD
|
— | — | — | — | — | — |
1,167,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
802,000,000
USD
|
803,000,000
USD
|
1,000,000
USD
|
803,000,000
USD
|
— | — | — | — | — | — | — |
| Other comprehensive income |
155,000,000
USD
|
— |
118,000,000
USD
|
37,000,000
USD
|
— | — | — | — | — |
155,000,000
USD
|
— | — | — | — | — | — | — | — | — |
66,000,000
USD
|
84,000,000
USD
|
12,000,000
USD
|
6,000,000
USD
|
78,000,000
USD
|
— | — | — | — | — | — | — |
| Comprehensive income |
1,320,000,000
USD
|
2,000,000
USD
|
1,283,000,000
USD
|
37,000,000
USD
|
— | — | — | — | — |
1,322,000,000
USD
|
— | — | — | — | — | — | — | — | — |
66,000,000
USD
|
886,000,000
USD
|
815,000,000
USD
|
5,000,000
USD
|
881,000,000
USD
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
444,000,000
USD
|
2,000,000
USD
|
444,000,000
USD
|
— | — | — | — | — | — |
446,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
428,000,000
USD
|
427,000,000
USD
|
1,000,000
USD
|
427,000,000
USD
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
149,000,000
USD
|
— |
149,000,000
USD
|
— | — | — | — | — | — |
149,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
106,000,000
USD
|
106,000,000
USD
|
— |
106,000,000
USD
|
— | — | — | — | — | — | — |