Statement Of Financial Position [Abstract]
| Concept |
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 |
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 |
As at 2021-12-31 |
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 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 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 |
As at 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 |
As at 2018-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Property, plant and equipment | — | — | — |
137,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
201,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — |
274,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
303,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements | — | — | — |
77,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
81,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — |
147,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
113,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — |
1,450,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,675,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — |
4,716,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
5,039,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Equity attributable to owners of parent | — | — | — |
1,481,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,857,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — | — | — |
7,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
8,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
904,000,000
USD
|
10,000,000
USD
|
2,873,000,000
USD
|
1,474,000,000
USD
|
5,000,000
USD
|
25,000,000
USD
|
22,000,000
USD
|
316,000,000
USD
|
1,481,000,000
USD
|
7,000,000
USD
|
154,000,000
USD
|
568,000,000
USD
|
8,000,000
USD
|
24,000,000
USD
|
1,857,000,000
USD
|
156,000,000
USD
|
1,000,000
USD
|
298,000,000
USD
|
11,000,000
USD
|
2,875,000,000
USD
|
1,849,000,000
USD
|
10,000,000
USD
|
1,473,000,000
USD
|
8,000,000
USD
|
2,870,000,000
USD
|
1,465,000,000
USD
|
809,000,000
USD
|
57,000,000
USD
|
381,000,000
USD
|
10,000,000
USD
|
5,000,000
USD
|
6,000,000
USD
|
151,000,000
USD
|
2,865,000,000
USD
|
8,000,000
USD
|
1,139,000,000
USD
|
1,131,000,000
USD
|
10,000,000
USD
|
4,000,000
USD
|
47,000,000
USD
|
146,000,000
USD
|
4,000,000
USD
|
420,000,000
USD
|
1,111,000,000
USD
|
| Liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Deferred tax liabilities | — | — | — |
93,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
95,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — |
6,190,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
6,888,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |