Analysis Of Income And Expense [Abstract]
| Concept |
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 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2018-01-01 to 2018-12-31 |
2018-01-01 to 2018-12-31 |
2018-01-01 to 2018-12-31 |
2018-01-01 to 2018-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||
| Revenue [abstract] | ||||||||||||
| Revenue | — |
9,245,000,000
USD
|
— | — | — | — |
10,554,000,000
USD
|
— |
12,046,000,000
USD
|
— | — | — |
| Material income and expense [abstract] | ||||||||||||
| Gains (losses) on disposals of property, plant and equipment [abstract] | ||||||||||||
| Gains (losses) on disposals of property, plant and equipment | — |
8,000,000
USD
|
— | — | — | — |
4,000,000
USD
|
— |
7,000,000
USD
|
— | — | — |
| Gains (losses) on disposals of investments [abstract] | ||||||||||||
| Gains (losses) on disposals of investments | — | — | — | — | — | — | — | — |
2,000,000
USD
|
— | — | — |
| Other operating income (expense) | — |
9,000,000
USD
|
— | — | — | — |
13,000,000
USD
|
— |
4,000,000
USD
|
— | — | — |
| Selling, general and administrative expense [abstract] | ||||||||||||
| Selling expense | — |
845,000,000
USD
|
— | — | — | — |
843,000,000
USD
|
— |
886,000,000
USD
|
— | — | — |
| General and administrative expense | — |
346,000,000
USD
|
— | — | — | — |
352,000,000
USD
|
— |
375,000,000
USD
|
— | — | — |
| Gains (losses) on change in fair value of derivatives [abstract] | ||||||||||||
| Gains (losses) on change in fair value of derivatives | — |
39,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Expenses by nature [abstract] | ||||||||||||
| Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract] | ||||||||||||
| Impairment loss (reversal of impairment loss) recognised in profit or loss | — |
5,000,000
USD
|
— | — | — | — |
30,000,000
USD
|
— |
4,000,000
USD
|
— | — | — |
| Tax expense other than income tax expense | — |
64,000,000
USD
|
— | — | — | — |
66,000,000
USD
|
— |
88,000,000
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 | — |
236,000,000
USD
|
— | — | — | — |
88,000,000
USD
|
— |
243,000,000
USD
|
— | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income |
1,236,000,000
USD
|
234,000,000
USD
|
2,000,000
USD
|
1,000,000,000
USD
|
642,000,000
USD
|
1,339,000,000
USD
|
1,985,000,000
USD
|
4,000,000
USD
|
1,089,000,000
USD
|
2,238,000,000
USD
|
1,151,000,000
USD
|
2,000,000
USD
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income, attributable to owners of parent | — |
236,000,000
USD
|
— | — | — | — |
1,981,000,000
USD
|
— |
1,087,000,000
USD
|
— | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income, attributable to non-controlling interests | — |
2,000,000
USD
|
— | — | — | — |
4,000,000
USD
|
— |
2,000,000
USD
|
— | — | — |