Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Vehicles [abstract] | |||
| Ships |
383,700,000
USD
|
376,800,000
USD
|
— |
| Other property, plant and equipment |
1,800,000
USD
|
1,200,000
USD
|
— |
| Trade and other current receivables [abstract] | |||
| Current trade receivables |
14,600,000
USD
|
20,600,000
USD
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
74,600,000
USD
|
91,600,000
USD
|
73,900,000
USD
|
| Miscellaneous current assets [abstract] | |||
| Other current assets |
18,000,000
USD
|
9,800,000
USD
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
415,500,000
USD
|
418,500,000
USD
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
4,000,000
USD
|
3,700,000
USD
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Current trade payables |
4,100,000
USD
|
3,100,000
USD
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Other non-current liabilities |
1,800,000
USD
|
1,900,000
USD
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Other current liabilities |
23,400,000
USD
|
17,500,000
USD
|
— |
| Issued capital [abstract] | |||
| Issued capital |
24,800,000
USD
|
12,400,000
USD
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
492,700,000
USD
|
500,000,000
USD
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
107,200,000
USD
|
122,000,000
USD
|
— |
| Current liabilities |
41,600,000
USD
|
42,300,000
USD
|
— |
| Assets less current liabilities [abstract] |