Statement Of Changes In Equity [Abstract]
| Concept |
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 |
2021-01-01 to 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 |
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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 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 |
2020-01-01 to 2020-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity |
148,000,000
USD
|
— |
3,472,000,000
USD
|
2,522,000,000
USD
|
— | — | — |
2,234,000,000
USD
|
— |
1,939,000,000
USD
|
2,054,000,000
USD
|
180,000,000
USD
|
1,928,000,000
USD
|
75,000,000
USD
|
— | — | — | — |
2,187,000,000
USD
|
129,000,000
USD
|
2,510,000,000
USD
|
791,000,000
USD
|
75,000,000
USD
|
— | — |
154,000,000
USD
|
3,936,000,000
USD
|
109,000,000
USD
|
— |
920,000,000
USD
|
— | — | — | — | — | — |
109,000,000
USD
|
1,676,000,000
USD
|
252,000,000
USD
|
3,048,000,000
USD
|
— | — |
2,492,000,000
USD
|
1,928,000,000
USD
|
2,217,000,000
USD
|
— |
169,000,000
USD
|
— | — |
75,000,000
USD
|
— |
110,000,000
USD
|
1,681,000,000
USD
|
3,820,000,000
USD
|
257,000,000
USD
|
196,000,000
USD
|
1,938,000,000
USD
|
2,480,000,000
USD
|
6,000,000
USD
|
75,000,000
USD
|
3,026,000,000
USD
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
73,000,000
USD
|
— | — | — | — |
3,034,000,000
USD
|
— | — | — | — | — | — | — | — |
3,107,000,000
USD
|
3,034,000,000
USD
|
858,000,000
USD
|
— | — | — | — | — | — |
848,000,000
USD
|
— | — | — | — | — | — |
10,000,000
USD
|
848,000,000
USD
|
— | — |
326,000,000
USD
|
— | — | — | — |
326,000,000
USD
|
39,000,000
USD
|
— | — | — |
365,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — |
2,000,000
USD
|
— | — | — | — |
24,000,000
USD
|
— |
39,000,000
USD
|
— | — | — | — | — | — |
26,000,000
USD
|
63,000,000
USD
|
908,000,000
USD
|
— | — | — | — | — | — |
1,000,000
USD
|
— | — | — | — | — |
888,000,000
USD
|
19,000,000
USD
|
889,000,000
USD
|
— |
772,000,000
USD
|
752,000,000
USD
|
— | — | — | — |
14,000,000
USD
|
22,000,000
USD
|
— | — | — |
774,000,000
USD
|
— | — |
6,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — |
75,000,000
USD
|
— | — | — |
1,000,000
USD
|
3,058,000,000
USD
|
— |
39,000,000
USD
|
— | — | — | — | — | — |
3,133,000,000
USD
|
3,098,000,000
USD
|
50,000,000
USD
|
— | — | — | — | — | — |
847,000,000
USD
|
— | — | — | — | — |
888,000,000
USD
|
9,000,000
USD
|
41,000,000
USD
|
1,000,000
USD
|
772,000,000
USD
|
1,078,000,000
USD
|
— | — | — | — |
314,000,000
USD
|
61,000,000
USD
|
— | — | — |
1,139,000,000
USD
|
— |
1,000,000
USD
|
6,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — | — | — |
6,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — |
6,000,000
USD
|
— | — | — | — | — | — |
15,000,000
USD
|
15,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
27,000,000
USD
|
— | — | — | — | — | — | — | — | — |
27,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
27,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
7,000,000
USD
|
— | — |
34,000,000
USD
|
7,000,000
USD
|
— | — |
10,000,000
USD
|
— | — | — | — |
10,000,000
USD
|
61,000,000
USD
|
— | — | — |
71,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — | — | — |
12,000,000
USD
|
— | — | — | — | — | — | — |
12,000,000
USD
|
12,000,000
USD
|
— |
11,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
11,000,000
USD
|
— | — | — |
11,000,000
USD
|
— | — |
13,000,000
USD
|
— | — | — | — | — | — | — | — | — |
13,000,000
USD
|
— |
13,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — |