Analysis Of Income And Expense [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||
| Revenue [abstract] | ||||||||||||
| Revenue | — | — | — | — |
873,000,000
USD
|
— | — | — |
807,000,000
USD
|
— | — | — |
| Material income and expense [abstract] | ||||||||||||
| Revenue and other operating income | — | — | — | — |
874,000,000
USD
|
— | — | — |
812,000,000
USD
|
— | — | — |
| Operating expense | — | — | — | — |
801,000,000
USD
|
— | — | — |
751,000,000
USD
|
— | — | — |
| Expenses by nature [abstract] | ||||||||||||
| Classes of employee benefits expense [abstract] | ||||||||||||
| Employee benefits expense | — | — | — | — |
321,000,000
USD
|
— | — | — |
299,000,000
USD
|
— | — | — |
| Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract] | ||||||||||||
| Depreciation and amortisation expense [abstract] | ||||||||||||
| Depreciation expense | — | — | — | — |
68,000,000
USD
|
— | — | — |
78,000,000
USD
|
— | — | — |
| Other expenses, by nature | — | — | — | — |
136,000,000
USD
|
— | — | — |
131,000,000
USD
|
— | — | — |
| Disclosure of attribution of expenses by nature to their function [text block] | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of attribution of expenses by nature to their function [abstract] | ||||||||||||
| Disclosure of attribution of expenses by nature to their function [line items] | ||||||||||||
| Miscellaneous other comprehensive income [abstract] | ||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations | — | — | — | — |
44,000,000
USD
|
— | — | — |
33,000,000
USD
|
— | — | — |
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||
| Share of profit (loss) of associates and joint ventures accounted for using equity method | — | — | — | — |
101,000,000
USD
|
— | — | — |
50,000,000
USD
|
— | — | — |
| Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax [abstract] | ||||||||||||
| Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax | — | — | — | — |
4,000,000
USD
|
— | — | — |
4,000,000
USD
|
— | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income |
23,000,000
USD
|
0
USD
|
0
USD
|
41,000,000
USD
|
17,000,000
USD
|
41,000,000
USD
|
141,000,000
USD
|
0
USD
|
200,000,000
USD
|
59,000,000
USD
|
141,000,000
USD
|
0
USD
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — |
41,000,000
USD
|
— | — | — |
141,000,000
USD
|
— | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — | — |
23,000,000
USD
|
— | — | — |
59,000,000
USD
|
— | — | — |