Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2018-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
2,681,000,000
USD
|
3,000,000,000
USD
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
6,392,000,000
USD
|
6,908,000,000
USD
|
— |
| Goodwill |
1 186,5
USD
|
1 206,9
USD
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
36,000,000
USD
|
30,000,000
USD
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
3,250,000,000
USD
|
4,360,000,000
USD
|
— |
| Categories of non-current financial assets [abstract] | |||
| Non-current financial assets |
136,000,000
USD
|
274,000,000
USD
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
3,854,000,000
USD
|
6,105,000,000
USD
|
4,341,000,000
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 sale |
1,177,000,000
USD
|
3,166,000,000
USD
|
— |
| Miscellaneous current assets [abstract] | |||
| Other current assets |
920,000,000
USD
|
1,167,000,000
USD
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
1 330,3
USD
|
1 266,6
USD
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings |
586,000,000
USD
|
594,000,000
USD
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Current borrowings and current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| 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 |
195,000,000
USD
|
369,000,000
USD
|
— |
| Accruals classified as current | — | — | — |
| Short-term employee benefits accruals |
1,066,000,000
USD
|
1,566,000,000
USD
|
— |
| Trade and other current payables |
967,000,000
USD
|
1,174,000,000
USD
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Other current liabilities |
2,786,000,000
USD
|
3,273,000,000
USD
|
— |
| Issued capital [abstract] | |||
| Issued capital |
87,000,000
USD
|
87,000,000
USD
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
4,806,000,000
USD
|
1 531,1
USD
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of cash flow hedges |
7,000,000
USD
|
7,000,000
USD
|
— |
| Miscellaneous equity [abstract] | |||
| Additional paid-in capital |
1 687,1
USD
|
3 184,7
USD
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
3 377,5
USD
|
4 012,6
USD
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
1 256,2
USD
|
1 764,8
USD
|
— |
| Current liabilities |
7,171,000,000
USD
|
1 066,1
USD
|
— |
| Assets less current liabilities [abstract] |