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Discontinued operations (Details 6) - USD ($) $ in Millions | Apr. 08, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | --- | --- | ---
Statement [line items] |  |  |  |  |  |
Property, plant and equipment |  | $ 12,263 | $ 12,069 |  |  |
Right-of-use assets |  | 1,676 | 1,677 | $ 1,554 |  |
Goodwill |  | 29,999 | 26,524 |  |  |
Intangible assets other than goodwill |  | 36,809 | 28,787 |  |  |
Deferred tax assets |  | 8,214 | 7,909 |  |  |
Inventories |  | 7,131 | 5,982 |  |  |
Cash and cash equivalents |  | 9,658 | 11,112 |  | $ 13,271 | $ 8,860
Deferred tax liabilities |  | (7,422) | (5,867) |  |  |
Current and non-current lease liabilities |  | $ (2,005) | $ (1,949) | (1,736) |  |
Discontinued operations |  |  |  |  |  |
Statement [line items] |  |  |  |  |  |
Property, plant and equipment | $ 2,858 |  |  |  |  |
Right-of-use assets | 269 |  |  | 276 |  |
Goodwill | 8,906 |  |  |  |  |
Intangible assets other than goodwill | 11,121 |  |  |  |  |
Deferred tax assets | 732 |  |  |  |  |
Financial and other non-current assets | 526 |  |  |  |  |
Inventories | 1,469 |  |  |  |  |
Trade receivables and other current assets | 1,787 |  |  |  |  |
Cash and cash equivalents | 628 |  |  |  |  |
Deferred tax liabilities | (1,713) |  |  |  |  |
Current and non-current lease liabilities | (269) |  |  | $ (286) |  |
Current and non-current financial debt | (3,538) |  |  |  |  |
Trade payables, provisions and other liabilities | (2,751) |  |  |  |  |
Net assets derecognized | $ 20,025 |  |  |  |  |

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