Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Vehicles [abstract] | |||
| Ships |
376,800,000
USD
|
397,000,000
USD
|
— |
| Other property, plant and equipment |
1,200,000
USD
|
2,200,000
USD
|
— |
| Trade and other current receivables [abstract] | |||
| Current trade receivables |
20,600,000
USD
|
14,100,000
USD
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
91,600,000
USD
|
73,900,000
USD
|
160,300,000
USD
|
| Miscellaneous current assets [abstract] | |||
| Other current assets |
9,800,000
USD
|
5,600,000
USD
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
418,500,000
USD
|
422,400,000
USD
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
3,700,000
USD
|
900,000
USD
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Current trade payables |
3,100,000
USD
|
1,800,000
USD
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Other non-current liabilities |
1,900,000
USD
|
2,200,000
USD
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Other current liabilities |
17,500,000
USD
|
18,500,000
USD
|
— |
| Issued capital [abstract] | |||
| Issued capital |
12,400,000
USD
|
497,500,000
USD
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
500,000,000
USD
|
492,800,000
USD
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
122,000,000
USD
|
93,600,000
USD
|
— |
| Current liabilities |
42,300,000
USD
|
31,900,000
USD
|
— |
| Assets less current liabilities [abstract] |