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Long-term debt - Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | $ 2,363,372 | $ 1,768,853
Egypt limited recourse debt facilities |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 46,948 | 75,165
Other limited recourse debt facilities |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 160,964 | 158,026
Unsecured notes |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 1,979,125 | 1,535,662
Construction Facility |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 176,335 | $ 0
Carrying amount |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 2,385,416 |
Carrying amount | 2021 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 40,376 |
Carrying amount | 2022 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 28,384 |
Carrying amount | 2023 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 12,424 |
Carrying amount | 2024 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 485,576 |
Carrying amount | 2025 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 13,654 |
Carrying amount | Thereafter |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 1,805,002 |
Carrying amount | Egypt limited recourse debt facilities |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 48,158 |
Carrying amount | Egypt limited recourse debt facilities | 2021 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 31,552 |
Carrying amount | Egypt limited recourse debt facilities | 2022 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 16,606 |
Carrying amount | Egypt limited recourse debt facilities | 2023 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Egypt limited recourse debt facilities | 2024 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Egypt limited recourse debt facilities | 2025 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Egypt limited recourse debt facilities | Thereafter |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Other limited recourse debt facilities |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 164,258 |
Carrying amount | Other limited recourse debt facilities | 2021 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 8,824 |
Carrying amount | Other limited recourse debt facilities | 2022 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 11,778 |
Carrying amount | Other limited recourse debt facilities | 2023 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 12,424 |
Carrying amount | Other limited recourse debt facilities | 2024 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 12,576 |
Carrying amount | Other limited recourse debt facilities | 2025 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 13,654 |
Carrying amount | Other limited recourse debt facilities | Thereafter |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 105,002 |
Carrying amount | Unsecured notes |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 2,000,000 |
Carrying amount | Unsecured notes | 2021 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Unsecured notes | 2022 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Unsecured notes | 2023 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Unsecured notes | 2024 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 300,000 |
Carrying amount | Unsecured notes | 2025 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Unsecured notes | Thereafter |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 1,700,000 |
Carrying amount | Construction Facility |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 173,000 |
Long-term debt exceeding principal payment | 3,300 |
Carrying amount | Construction Facility | 2021 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Construction Facility | 2022 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Construction Facility | 2023 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Construction Facility | 2024 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 173,000 |
Carrying amount | Construction Facility | 2025 |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | 0 |
Carrying amount | Construction Facility | Thereafter |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Long-term debt | $ 0 |

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