Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2021-12-31 |
As at 2021-01-01 |
As at 2020-12-31 |
As at 2020-01-01 |
As at 2019-12-31 |
As at 2019-01-01 |
|---|---|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||||
| Property, plant and equipment [abstract] | ||||||
| Property, plant and equipment |
3,169,000,000
USD
|
— |
4,314,000,000
USD
|
— |
4,925,000,000
USD
|
— |
| Intangible assets and goodwill [abstract] | ||||||
| Intangible assets other than goodwill [abstract] | ||||||
| Intangible assets other than goodwill |
126,000,000
USD
|
— |
138,000,000
USD
|
— |
185,000,000
USD
|
— |
| Goodwill |
457,000,000
USD
|
— |
457,000,000
USD
|
— |
594,000,000
USD
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||||||
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements |
100,000,000
USD
|
— |
79,000,000
USD
|
— |
92,000,000
USD
|
— |
| Trade and other non-current receivables [abstract] | ||||||
| Non-current receivables due from related parties |
10,000,000
USD
|
— | — | — | — | — |
| Trade and other current receivables [abstract] | ||||||
| Current receivables due from related parties |
34,000,000
USD
|
— |
10,000,000
USD
|
— |
10,000,000
USD
|
— |
| Current prepayments and current accrued income other than current contract assets [abstract] | ||||||
| Current prepayments [abstract] | ||||||
| Current prepayments |
96,000,000
USD
|
— |
80,000,000
USD
|
— |
93,000,000
USD
|
— |
| Current receivables from taxes other than income tax |
171,000,000
USD
|
— |
178,000,000
USD
|
— |
175,000,000
USD
|
— |
| Trade and other current receivables |
626,000,000
USD
|
— |
378,000,000
USD
|
— |
534,000,000
USD
|
— |
| Current prepayments and current accrued income including current contract assets [abstract] | ||||||
| Categories of current financial assets [abstract] | ||||||
| Current loans and receivables | — | — | — | — |
32,000,000
USD
|
— |
| Classes of current inventories [abstract] | ||||||
| Current inventories |
1,565,000,000
USD
|
— |
1,085,000,000
USD
|
— |
1,480,000,000
USD
|
— |
| Classes of current inventories, alternative [abstract] | ||||||
| Cash and cash equivalents [abstract] | ||||||
| Cash and cash equivalents |
1,027,000,000
USD
|
1,627,000,000
USD
|
1,627,000,000
USD
|
1,423,000,000
USD
|
1,423,000,000
USD
|
1,067,000,000
USD
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | ||||||
| Non-current assets or disposal groups classified as held for distribution to owners |
2,169,000,000
USD
|
— | — | — | — | — |
| Borrowings [abstract] | ||||||
| Non-current portion of non-current borrowings |
3,440,000,000
USD
|
— |
3,759,000,000
USD
|
— |
4,599,000,000
USD
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | ||||||
| Current borrowings and current portion of non-current borrowings, by type [abstract] | ||||||
| Current loans received and current portion of non-current loans received |
101,000,000
USD
|
— |
1,078,000,000
USD
|
— |
140,000,000
USD
|
— |
| Trade and other current payables [abstract] | ||||||
| Current payables to related parties |
50,000,000
USD
|
— |
38,000,000
USD
|
— |
19,000,000
USD
|
— |
| Current accruals and current deferred income including current contract liabilities [abstract] | ||||||
| Current deferred income including current contract liabilities [abstract] | ||||||
| Current contract liabilities [abstract] | ||||||
| Current contract liabilities |
250,000,000
USD
|
— |
314,000,000
USD
|
— |
348,000,000
USD
|
— |
| Current payables on social security and taxes other than income tax |
145,000,000
USD
|
— |
169,000,000
USD
|
— |
153,000,000
USD
|
— |
| Trade and other current payables |
1,539,000,000
USD
|
— |
1,264,000,000
USD
|
— |
1,378,000,000
USD
|
— |
| Miscellaneous non-current liabilities [abstract] | ||||||
| Other non-current liabilities |
77,000,000
USD
|
— |
102,000,000
USD
|
— |
40,000,000
USD
|
— |
| Miscellaneous current liabilities [abstract] | ||||||
| Current dividend payables |
292,000,000
USD
|
— | — | — | — | — |
| Issued capital [abstract] | ||||||
| Issued capital |
75,000,000
USD
|
— |
75,000,000
USD
|
— |
75,000,000
USD
|
— |
| Retained earnings [abstract] | ||||||
| Retained earnings |
3,472,000,000
USD
|
— |
2,187,000,000
USD
|
— |
2,217,000,000
USD
|
— |
| Accumulated other comprehensive income [abstract] | ||||||
| Revaluation surplus | — | — |
109,000,000
USD
|
— |
109,000,000
USD
|
— |
| Reserve of exchange differences on translation |
1,928,000,000
USD
|
— |
3,936,000,000
USD
|
— |
3,048,000,000
USD
|
— |
| Miscellaneous equity [abstract] | ||||||
| Additional paid-in capital |
2,522,000,000
USD
|
— |
2,510,000,000
USD
|
— |
2,492,000,000
USD
|
— |
| Net assets (liabilities) [abstract] | ||||||
| Assets |
9,854,000,000
USD
|
— |
8,710,000,000
USD
|
— |
9,847,000,000
USD
|
— |
| Liabilities |
7,620,000,000
USD
|
— |
7,790,000,000
USD
|
— |
7,919,000,000
USD
|
— |
| Net current assets (liabilities) [abstract] | ||||||
| Current assets |
5,729,000,000
USD
|
— |
3,406,000,000
USD
|
— |
3,804,000,000
USD
|
— |
| Current liabilities |
3,535,000,000
USD
|
— |
3,107,000,000
USD
|
— |
2,253,000,000
USD
|
— |
| Assets less current liabilities [abstract] |