Statement Of Financial Position [Abstract]
| Concept |
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 2020-01-01 |
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 2019-01-01 |
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 2018-01-01 |
As at 2018-01-01 |
As at 2018-01-01 |
As at 2018-01-01 |
As at 2018-01-01 |
As at 2018-01-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||||
| Property, plant and equipment | — | — | — | — | — |
5,659,000,000
USD
|
— | — | — |
6,039,000,000
USD
|
— | — | — | — | — |
4,798,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Goodwill | — | — | — | — | — |
212,000,000
USD
|
— | — | — |
248,000,000
USD
|
— | — | — | — | — |
224,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill | — | — | — | — | — |
159,000,000
USD
|
— | — | — |
162,000,000
USD
|
— | — | — | — | — |
165,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements | — | — | — | — | — |
131,000,000
USD
|
— | — | — |
223,000,000
USD
|
— | — | — | — | — |
159,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — | — | — |
119,000,000
USD
|
— | — | — |
101,000,000
USD
|
— | — | — | — | — |
152,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Non-current assets | — | — | — | — | — |
6,292,000,000
USD
|
— | — | — |
6,789,000,000
USD
|
— | — | — | — | — |
5,594,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||||
| Current inventories | — | — | — | — | — |
1,373,000,000
USD
|
— | — | — |
1,634,000,000
USD
|
— | — | — | — | — |
1,816,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Trade and other current receivables | — | — | — | — | — |
1,148,000,000
USD
|
— | — | — |
1,047,000,000
USD
|
— | — | — | — | — |
1,326,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — | — |
842,000,000
USD
|
713,000,000
USD
|
— | — |
713,000,000
USD
|
— | — | — |
1,179,000,000
USD
|
— |
1,179,000,000
USD
|
— | — | — | — | — | — | — | — |
301,000,000
USD
|
— |
| Current assets | — | — | — | — | — |
3,570,000,000
USD
|
— | — | — |
3,695,000,000
USD
|
— | — | — | — | — |
4,350,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — | — | — |
9,862,000,000
USD
|
— | — | — |
10,484,000,000
USD
|
— | — | — | — | — |
9,944,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||
| Issued capital | — | — | — | — | — |
221,000,000
USD
|
— | — | — |
221,000,000
USD
|
— | — | — | — | — |
221,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — | — |
11,641,000,000
USD
|
— | — | — |
11,840,000,000
USD
|
— | — | — | — | — |
12,370,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — | — | — |
4,730,000,000
USD
|
— | — | — |
5,930,000,000
USD
|
— | — | — | — | — |
5,819,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — | — | — | — | — |
11,000,000
USD
|
— | — | — |
17,000,000
USD
|
— | — | — | — | — |
15,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Equity |
11,641,000,000
USD
|
11,000,000
USD
|
8,000,000
USD
|
221,000,000
USD
|
7,140,000,000
USD
|
4,741,000,000
USD
|
— |
17,000,000
USD
|
9,000,000
USD
|
5,947,000,000
USD
|
11,840,000,000
USD
|
6,140,000,000
USD
|
221,000,000
USD
|
— |
15,000,000
USD
|
5,834,000,000
USD
|
6,782,000,000
USD
|
10,000,000
USD
|
221,000,000
USD
|
12,370,000,000
USD
|
10,000,000
USD
|
5,631,000,000
USD
|
17,000,000
USD
|
221,000,000
USD
|
6,646,000,000
USD
|
12,029,000,000
USD
|
| Liabilities [abstract] | ||||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||||
| Deferred tax liabilities | — | — | — | — | — |
359,000,000
USD
|
— | — | — |
405,000,000
USD
|
— | — | — | — | — |
346,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Non-current liabilities | — | — | — | — | — |
2,839,000,000
USD
|
— | — | — |
2,595,000,000
USD
|
— | — | — | — | — |
2,037,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||||
| Trade and other current payables | — | — | — | — | — |
1,065,000,000
USD
|
— | — | — |
1,124,000,000
USD
|
— | — | — | — | — |
1,122,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Current tax liabilities, current | — | — | — | — | — |
51,000,000
USD
|
— | — | — |
32,000,000
USD
|
— | — | — | — | — |
28,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Other current financial liabilities | — | — | — | — | — |
3,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities | — | — | — | — | — |
2,282,000,000
USD
|
— | — | — |
1,942,000,000
USD
|
— | — | — | — | — |
2,073,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — | — |
5,121,000,000
USD
|
— | — | — |
4,537,000,000
USD
|
— | — | — | — | — |
4,110,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — | — | — |
9,862,000,000
USD
|
— | — | — |
10,484,000,000
USD
|
— | — | — | — | — |
9,944,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |