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 |
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 |
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 |
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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 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 |
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 | — |
41,787,000,000
USD
|
— | — |
45,588,000,000
USD
|
160,000,000
USD
|
135,000,000
USD
|
— | — |
44,508,000,000
USD
|
1,080,000,000
USD
|
— |
767,000,000
USD
|
3,513,000,000
USD
|
— | — | — |
26,698,000,000
USD
|
1,004,000,000
USD
|
42,000,000
USD
|
29,850,000,000
USD
|
3,632,000,000
USD
|
— | — | — |
432,000,000
USD
|
6,000,000
USD
|
— |
30,854,000,000
USD
|
— | — | — |
28,098,000,000
USD
|
739,000,000
USD
|
692,000,000
USD
|
28,837,000,000
USD
|
4,000,000
USD
|
25,117,000,000
USD
|
97,000,000
USD
|
3,774,000,000
USD
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
91,000,000
USD
|
— |
-
USD
|
17,942,000,000
USD
|
— | — | — |
-
USD
|
-
USD
|
— | — |
-
USD
|
— | — |
18,033,000,000
USD
|
17,942,000,000
USD
|
2,900,000,000
USD
|
— | — | — | — | — |
-
USD
|
2,850,000,000
USD
|
-
USD
|
— | — |
-
USD
|
— |
-
USD
|
50,000,000
USD
|
2,850,000,000
USD
|
— | — | — | — | — | — | — | — |
| Other comprehensive income |
4,000,000
USD
|
— |
118,000,000
USD
|
331,000,000
USD
|
— | — | — |
335,000,000
USD
|
144,000,000
USD
|
— | — |
-
USD
|
— | — |
335,000,000
USD
|
22,000,000
USD
|
108,000,000
USD
|
— | — | — | — | — |
1,000,000
USD
|
205,000,000
USD
|
55,000,000
USD
|
— | — |
-
USD
|
— |
260,000,000
USD
|
3,000,000
USD
|
111,000,000
USD
|
— | — | — | — | — | — | — | — |
| Comprehensive income |
87,000,000
USD
|
— |
118,000,000
USD
|
17,611,000,000
USD
|
— | — | — |
335,000,000
USD
|
144,000,000
USD
|
— | — |
-
USD
|
— | — |
17,698,000,000
USD
|
17,920,000,000
USD
|
3,008,000,000
USD
|
— | — | — | — | — |
1,000,000
USD
|
2,645,000,000
USD
|
55,000,000
USD
|
— | — |
-
USD
|
— |
260,000,000
USD
|
47,000,000
USD
|
2,961,000,000
USD
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
96,000,000
USD
|
— |
-
USD
|
1,017,000,000
USD
|
— | — | — |
-
USD
|
-
USD
|
— | — |
-
USD
|
— | — |
1,113,000,000
USD
|
1,017,000,000
USD
|
520,000,000
USD
|
— | — | — | — | — |
-
USD
|
430,000,000
USD
|
-
USD
|
— | — |
-
USD
|
— |
-
USD
|
90,000,000
USD
|
430,000,000
USD
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
-
USD
|
— |
-
USD
|
1,000,000
USD
|
— | — | — |
-
USD
|
-
USD
|
— | — |
-
USD
|
— | — |
1,000,000
USD
|
1,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
-
USD
|
— |
-
USD
|
17,000,000
USD
|
— | — | — |
-
USD
|
-
USD
|
— | — |
-
USD
|
— | — |
17,000,000
USD
|
17,000,000
USD
|
11,000,000
USD
|
— | — | — | — | — |
-
USD
|
11,000,000
USD
|
-
USD
|
— | — |
-
USD
|
— |
-
USD
|
-
USD
|
11,000,000
USD
|
— | — | — | — | — | — | — | — |