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Non-current financial debt (Details 5) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of fair value measurement of liabilities [line items] |  |
Straight bonds | $ 28,298 | $ 22,167
Total | 28,531 | 22,355
Balance sheet |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Straight bonds | 28,298 | 22,167
Others | 233 | 188
Total | 28,531 | 22,355
Fair values |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Straight bonds | 31,359 | 23,701
Others | 233 | 188
Total | $ 31,592 | $ 23,889

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