Statement Of Changes In Equity [Abstract]
| Concept |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
2021-04-01 to 2022-03-31 |
As at 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 |
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 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
2020-04-01 to 2021-03-31 |
As at 2021-03-31 |
2020-04-01 to 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
2020-04-01 to 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 |
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 | — |
2,412,000,000
USD
|
— |
942,000,000
USD
|
— | — |
3,502,000,000
USD
|
3,420,000,000
USD
|
3,436,000,000
USD
|
— | — | — |
3,649,000,000
USD
|
147,000,000
USD
|
2,975,000,000
USD
|
3,353,000,000
USD
|
3,420,000,000
USD
|
— |
52,000,000
USD
|
— |
3,405,000,000
USD
|
594,000,000
USD
|
— |
2,396,000,000
USD
|
— | — | — | — |
107,000,000
USD
|
3,388,000,000
USD
|
2,805,000,000
USD
|
585,000,000
USD
|
2,252,000,000
USD
|
3,281,000,000
USD
|
3,420,000,000
USD
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) |
631,000,000
USD
|
— |
124,000,000
USD
|
— |
631,000,000
USD
|
–
USD
|
— | — | — |
–
USD
|
–
USD
|
755,000,000
USD
|
— | — | — | — | — |
–
USD
|
— |
–
USD
|
— | — |
415,000,000
USD
|
— |
–
USD
|
339,000,000
USD
|
76,000,000
USD
|
339,000,000
USD
|
— | — | — | — | — | — | — |
| Other comprehensive income |
12,000,000
USD
|
— |
2,000,000
USD
|
— |
0
USD
|
–
USD
|
— | — | — |
12,000,000
USD
|
–
USD
|
14,000,000
USD
|
— | — | — | — | — |
140,000,000
USD
|
— |
–
USD
|
— | — |
149,000,000
USD
|
— |
–
USD
|
0
USD
|
9,000,000
USD
|
140,000,000
USD
|
— | — | — | — | — | — | — |
| Comprehensive income |
619,000,000
USD
|
— |
122,000,000
USD
|
— |
631,000,000
USD
|
–
USD
|
— | — | — |
12,000,000
USD
|
–
USD
|
741,000,000
USD
|
— | — | — | — | — |
140,000,000
USD
|
— |
–
USD
|
— | — |
266,000,000
USD
|
— |
–
USD
|
339,000,000
USD
|
67,000,000
USD
|
199,000,000
USD
|
— | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
349,000,000
USD
|
— |
153,000,000
USD
|
— |
–
USD
|
–
USD
|
— | — | — |
1,000,000
USD
|
348,000,000
USD
|
196,000,000
USD
|
— | — | — | — | — |
–
USD
|
— |
9,000,000
USD
|
— | — |
8,000,000
USD
|
— |
–
USD
|
–
USD
|
1,000,000
USD
|
9,000,000
USD
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
2,000,000
USD
|
— |
–
USD
|
— |
1,000,000
USD
|
–
USD
|
— | — | — |
3,000,000
USD
|
–
USD
|
2,000,000
USD
|
— | — | — | — | — |
0
USD
|
— |
–
USD
|
— | — |
0
USD
|
— |
–
USD
|
0
USD
|
–
USD
|
0
USD
|
— | — | — | — | — | — | — |