Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
2021-01-01 to 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 |
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 |
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 |
2020-01-01 to 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 |
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 |
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 | — |
201,000,000
USD
|
5,700,000,000
USD
|
— |
642,000,000
USD
|
50,000,000
USD
|
4,641,000,000
USD
|
— | — |
1 006,4
USD
|
8,000,000
USD
|
9,627,000,000
USD
|
— | — | — |
87,000,000
USD
|
437,000,000
USD
|
— | — | — | — |
4,806,000,000
USD
|
449,000,000
USD
|
7,000,000
USD
|
373,000,000
USD
|
1 687,1
USD
|
374,000,000
USD
|
1 119,7
USD
|
— |
87,000,000
USD
|
— | — |
201,000,000
USD
|
— | — |
1 164,6
USD
|
— | — | — | — |
1 560,4
USD
|
457,000,000
USD
|
3 184,7
USD
|
1 606,1
USD
|
1 532,4
USD
|
201,000,000
USD
|
7,000,000
USD
|
87,000,000
USD
|
235,000,000
USD
|
563,000,000
USD
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
5,000,000
USD
|
— | — | — | — | — | — | — |
1,805,000,000
USD
|
— | — | — | — | — | — | — | — | — |
1,800,000,000
USD
|
1,805,000,000
USD
|
4,368,000,000
USD
|
— | — | — | — | — | — | — | — | — |
4,405,000,000
USD
|
— | — | — | — | — | — |
37,000,000
USD
|
— |
4,405,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
10,000,000
USD
|
— | — |
1,000,000
USD
|
— | — | — |
-
USD
|
182,000,000
USD
|
— | — | — |
268,000,000
USD
|
-
USD
|
-
USD
|
— | — |
-
USD
|
172,000,000
USD
|
87,000,000
USD
|
135,000,000
USD
|
— | — | — | — | — | — | — |
-
USD
|
— |
68,000,000
USD
|
-
USD
|
— |
-
USD
|
-
USD
|
— |
-
USD
|
27,000,000
USD
|
176,000,000
USD
|
108,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
15,000,000
USD
|
— | — |
1,000,000
USD
|
— | — | — |
-
USD
|
1,987,000,000
USD
|
— | — | — |
268,000,000
USD
|
-
USD
|
-
USD
|
— | — |
-
USD
|
1,972,000,000
USD
|
1,718,000,000
USD
|
4,233,000,000
USD
|
— | — | — | — | — | — | — |
-
USD
|
— |
4,473,000,000
USD
|
-
USD
|
— |
-
USD
|
-
USD
|
— |
-
USD
|
64,000,000
USD
|
176,000,000
USD
|
4,297,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
36,000,000
USD
|
— | — | — | — | — | — | — |
-
USD
|
— | — | — | — | — | — | — | — | — |
36,000,000
USD
|
— |
72,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
72,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — | — | — | — | — |
6,000,000
USD
|
— | — | — | — | — | — | — | — | — |
6,000,000
USD
|
6,000,000
USD
|
37,000,000
USD
|
— | — | — | — | — | — | — | — | — |
37,000,000
USD
|
— | — | — | — | — | — | — | — |
37,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |