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Non-current and current financial debts - Schedule of financial debts (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019 | Apr. 02, 2019
--- | --- | --- | ---
Disclosure of detailed information about borrowings [line items] |  |  |
Non-current financial debts | $ 3,909 | $ 3,218 |
Current financial debts | 235 | 261 |
Borrowings | 4,144 | 3,479 | $ 3,500
Facility B |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Non-current financial debts | 794 | 793 |
Facility C |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Non-current financial debts | 391 | 391 |
Local facilities (Japan) |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Non-current financial debts | 0 | 55 |
Current financial debts | 137 | 115 |
Series 2026 notes |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Non-current financial debts | 495 | 495 |
Series 2029 notes |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Non-current financial debts | 991 | 991 |
Series 2030 notes |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Non-current financial debts | 744 | 0 |
Series 2049 notes |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Non-current financial debts | 494 | 493 |
Revolving facility |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Non-current financial debts | 0 | 0 |
Local facilities, all others |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Current financial debts | 71 | 101 |
Other short-term financial debts |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Current financial debts | 26 | 29 |
Derivatives |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Current financial debts | $ 1 | $ 16 |

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