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Financial risk management (Tables) | 12 Months Ended
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Dec. 31, 2020
Financial Instruments [Abstract] |
Schedule of interest rate risk exposure | The Company’s interest rate risk exposure is mainly related to long-term debt obligations.
As at | Dec 31 2020 | Dec 31 2019
Fixed interest rate debt: |  |
Unsecured notes | $ | 1,979,125 |  | $ | 1,535,662 |
Other limited recourse debt facilities | 160,964 |  | 156,500 |
| $ | 2,140,089 |  | $ | 1,692,162 |
Variable interest rate debt: |  |
Geismar 3 construction facility | $ | 176,335 |  | $ | — |
Egypt limited recourse debt facilities | 46,948 |  | 75,165 |
Other limited recourse debt facilities | — |  | 1,526 |
| $ | 223,283 |  | $ | 76,691 |
Expected cash flows of financial liabilities by maturity date | The expected cash flows of financial liabilities from the date of the balance sheet to the contractual maturity date are as follows:
As at December 31, 2020 | Carrying amount | Contractual cash flows |  | 1 year or less | 1-3 years | 3-5 years | More than 5 years
Trade and other payables 1 | $ | 485,545 | $ | 485,545 |  | $ | 485,545 | $ | — | $ | — | $ | —
Lease obligations 2 | 722,234 | 982,387 |  | 142,096 | 228,493 | 192,342 | 419,456
Long-term debt 2 | 2,363,372 | 3,509,538 |  | 158,063 | 274,599 | 708,577 | 2,368,299
Cash flow hedges 3 | 181,372 | 214,622 |  | 15,047 | 44,841 | 63,002 | 91,732
| $ | 3,752,523 | $ | 5,192,092 |  | $ | 800,751 | $ | 547,933 | $ | 963,921 | $ | 2,879,487
1 Excludes tax and accrued interest. 2 Contractual cash flows include contractual interest payments related to debt obligations and lease obligations. Interest rates on variable rate debt are based on prevailing rates as at December 31, 2020. 3 Cash flow hedges includes the impact of discounting and credit valuation adjustments

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- Definition The disclosure of how the entity manages its liquidity risk. [Refer: Liquidity risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 39 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_39_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The disclosure of information that enables users of financial statements to evaluate the nature and extent of risks arising from financial instruments to which the entity is exposed. [Refer: Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 31 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_31&doctype=Standard -URIDate 2020-01-01 + Details
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