Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity | — |
11,281,000,000
USD
|
— |
6,330,000,000
USD
|
— | — |
6,308,000,000
USD
|
969,000,000
USD
|
— |
6,328,000,000
USD
|
386,000,000
USD
|
22,000,000
USD
|
— | — | — |
9,522,000,000
USD
|
19,000,000
USD
|
4,582,000,000
USD
|
386,000,000
USD
|
— |
6,295,000,000
USD
|
969,000,000
USD
|
— |
4,601,000,000
USD
|
— | — | — | — |
5,497,000,000
USD
|
22,000,000
USD
|
5,458,000,000
USD
|
969,000,000
USD
|
5,519,000,000
USD
|
9,600,000,000
USD
|
386,000,000
USD
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) |
3,000,000
USD
|
— |
3,118,000,000
USD
|
— |
-
USD
|
-
USD
|
— | — |
-
USD
|
— | — | — |
3,121,000,000
USD
|
3,118,000,000
USD
|
604,000,000
USD
|
— | — | — | — |
603,000,000
USD
|
— | — |
-
USD
|
— |
-
USD
|
1,000,000
USD
|
-
USD
|
603,000,000
USD
|
— | — | — | — | — | — | — |
| Other comprehensive income |
-
USD
|
— |
31,000,000
USD
|
— |
-
USD
|
33,000,000
USD
|
— | — |
-
USD
|
— | — | — |
31,000,000
USD
|
2,000,000
USD
|
840,000,000
USD
|
— | — | — | — |
-
USD
|
— | — |
-
USD
|
— |
837,000,000
USD
|
3,000,000
USD
|
-
USD
|
837,000,000
USD
|
— | — | — | — | — | — | — |
| Comprehensive income |
3,000,000
USD
|
— |
3,087,000,000
USD
|
— |
-
USD
|
33,000,000
USD
|
— | — |
-
USD
|
— | — | — |
3,090,000,000
USD
|
3,120,000,000
USD
|
236,000,000
USD
|
— | — | — | — |
603,000,000
USD
|
— | — |
-
USD
|
— |
837,000,000
USD
|
2,000,000
USD
|
-
USD
|
234,000,000
USD
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
-
USD
|
— |
1,361,000,000
USD
|
— |
-
USD
|
-
USD
|
— | — |
-
USD
|
— | — | — |
1,361,000,000
USD
|
1,361,000,000
USD
|
682,000,000
USD
|
— | — | — | — |
682,000,000
USD
|
— | — |
-
USD
|
— |
-
USD
|
-
USD
|
-
USD
|
682,000,000
USD
|
— | — | — | — | — | — | — |