Statement Of Changes In Equity [Abstract]
| Concept |
As at 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 |
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 |
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 |
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 |
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 |
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 |
1,438,000,000
USD
|
3,000,000
USD
|
1,295,000,000
USD
|
— |
203,000,000
USD
|
— | — | — |
7,000,000
USD
|
— |
20,000,000
USD
|
70,000,000
USD
|
— | — | — |
1,311,000,000
USD
|
73,000,000
USD
|
— |
13,000,000
USD
|
1,295,000,000
USD
|
6,000,000
USD
|
— | — |
82,000,000
USD
|
— | — |
–
USD
|
— |
1,295,000,000
USD
|
23,000,000
USD
|
5,000,000
USD
|
20 9
USD
|
1,449,000,000
USD
|
–
USD
|
73,000,000
USD
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — |
–
USD
|
— |
–
USD
|
–
USD
|
–
USD
|
— |
–
USD
|
— | — |
205,000,000
USD
|
205,000,000
USD
|
14 8
USD
|
— | — |
148,000,000
USD
|
— | — | — |
–
USD
|
–
USD
|
— |
–
USD
|
–
USD
|
— |
–
USD
|
— | — | — | — | — | — | — |
| Other comprehensive income | — | — | — |
–
USD
|
— |
–
USD
|
–
USD
|
7,000,000
USD
|
— |
–
USD
|
— | — |
7,000,000
USD
|
–
USD
|
10,000,000
USD
|
— | — |
–
USD
|
— | — | — |
–
USD
|
–
USD
|
— |
10,000,000
USD
|
–
USD
|
— |
–
USD
|
— | — | — | — | — | — | — |
| Comprehensive income | — | — | — |
–
USD
|
— |
–
USD
|
–
USD
|
7,000,000
USD
|
— |
–
USD
|
— | — |
198,000,000
USD
|
205,000,000
USD
|
138,000,000
USD
|
— | — |
148,000,000
USD
|
— | — | — |
–
USD
|
–
USD
|
— |
10,000,000
USD
|
–
USD
|
— |
–
USD
|
— | — | — | — | — | — | — |
| Issue of equity | — | — | — |
–
USD
|
— |
1,000,000
USD
|
–
USD
|
–
USD
|
— |
–
USD
|
— | — |
1,000,000
USD
|
–
USD
|
1,000,000
USD
|
— | — |
–
USD
|
— | — | — |
–
USD
|
–
USD
|
— |
–
USD
|
1,000,000
USD
|
— |
–
USD
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — |
–
USD
|
— |
–
USD
|
–
USD
|
–
USD
|
— |
–
USD
|
— | — |
11,000,000
USD
|
11,000,000
USD
|
8,000,000
USD
|
— | — |
8,000,000
USD
|
— | — | — |
–
USD
|
–
USD
|
— |
–
USD
|
–
USD
|
— |
–
USD
|
— | — | — | — | — | — | — |
| Increase (decrease) in equity | — | — | — |
–
USD
|
— |
1,000,000
USD
|
3,000,000
USD
|
–
USD
|
— |
3,000,000
USD
|
— | — |
77,000,000
USD
|
78,000,000
USD
|
11,000,000
USD
|
— | — |
10,000,000
USD
|
— | — | — |
–
USD
|
–
USD
|
— |
–
USD
|
1,000,000
USD
|
— |
–
USD
|
— | — | — | — | — | — | — |