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Financial risk management - Liquidity risks (Details) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Financial Instruments [Abstract] |  |  |
Cash and cash equivalents | $ 857,747,000 | $ 932,069,000 | $ 833,841,000
Carrying amount |  |  |
Lease obligations | 870,163,000 | 717,101,000 | $ 722,234,000
Other long-term liabilities | 134,603,000 | 193,749,000 |
Long-term debt | 2,151,513,000 | 2,158,192,000 |
Cash flow hedges (note 19) | 6,739,000 | 60,098,000 |
Financial liabilities | 3,714,666,000 | 3,624,851,000 |
Liquidity risk |  |  |
Carrying amount |  |  |
Trade and other payables | 641,338,000 |  |
Lease obligations | 870,163,000 |  |
Other long-term liabilities | 28,514,000 |  |
Long-term debt | 2,151,513,000 |  |
Cash flow hedges (note 19) | 8,466,000 |  |
Financial liabilities | 3,699,994,000 |  |
Contractual cash flows |  |  |
Trade and other payables | 641,338,000 |  |
Lease obligations | 1,151,979,000 |  |
Other long-term liabilities | 55,548,000 |  |
Long-term debt | 3,057,230,000 |  |
Cash flow hedges | 9,182,000 |  |
Financial liabilities | 4,915,277,000 |  |
Liquidity risk | 1 year or less |  |  |
Contractual cash flows |  |  |
Trade and other payables | 641,338,000 |  |
Lease obligations | 156,807,000 |  |
Other long-term liabilities | 2,200,000 |  |
Long-term debt | 126,373,000 |  |
Cash flow hedges | 2,050,000 |  |
Financial liabilities | 928,768,000 |  |
Liquidity risk | 1-3 years |  |  |
Contractual cash flows |  |  |
Trade and other payables | 0 |  |
Lease obligations | 264,936,000 |  |
Other long-term liabilities | 4,400,000 |  |
Long-term debt | 533,974,000 |  |
Cash flow hedges | 7,132,000 |  |
Financial liabilities | 810,442,000 |  |
Liquidity risk | 3-5 years |  |  |
Contractual cash flows |  |  |
Trade and other payables | 0 |  |
Lease obligations | 206,710,000 |  |
Other long-term liabilities | 4,400,000 |  |
Long-term debt | 915,014,000 |  |
Cash flow hedges | 0 |  |
Financial liabilities | 1,126,124,000 |  |
Liquidity risk | Thereafter |  |  |
Contractual cash flows |  |  |
Trade and other payables | 0 |  |
Lease obligations | 523,526,000 |  |
Other long-term liabilities | 44,548,000 |  |
Long-term debt | 1,481,869,000 |  |
Cash flow hedges | 0 |  |
Financial liabilities | 2,049,943,000 |  |
Revolving credit facility |  |  |
Disclosure of financial liabilities [line items] |  |  |
Undrawn credit facility | 300,000,000 | 300,000,000 |
Geismar 3 construction facility |  |  |
Disclosure of financial liabilities [line items] |  |  |
Undrawn credit facility | $ 300,000,000 | $ 600,000,000 |

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- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_45&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2022-03-24 -Paragraph B13 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2022-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 54 -Subparagraph i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_i&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard -URIDate 2022-03-24 + Details
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