Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
2,600,000
USD
|
3,000,000
USD
|
— |
| Trade and other non-current receivables [abstract] | |||
| Other non-current receivables |
27,100,000
USD
|
30,200,000
USD
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current derivative financial assets |
200,000
USD
|
-
USD
|
— |
| Trade and other receivables [abstract] | |||
| Trade receivables |
106,900,000
USD
|
100,000,000
USD
|
— |
| Prepayments and accrued income including contract assets [abstract] | |||
| Accrued income including contract assets [abstract] | |||
| Contract assets |
7,500,000
USD
|
8,400,000
USD
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
118,100,000
USD
|
129,200,000
USD
|
157,200,000
USD
|
| Miscellaneous current assets [abstract] | |||
| Other current assets |
13,600,000
USD
|
16,600,000
USD
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
527,300,000
USD
|
561,800,000
USD
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current portion of non-current borrowings |
95,000,000
USD
|
149,600,000
USD
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Current accruals and current deferred income including current contract liabilities [abstract] | |||
| Current deferred income including current contract liabilities [abstract] | |||
| Current contract liabilities [abstract] | |||
| Current contract liabilities |
44,100,000
USD
|
22,100,000
USD
|
— |
| Trade and other payables [abstract] | |||
| Trade payables |
35,500,000
USD
|
48,900,000
USD
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current derivative financial liabilities |
200,000
USD
|
1,300,000
USD
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Other current liabilities |
55,700,000
USD
|
58,400,000
USD
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
2,214,900,000
USD
|
2,308,800,000
USD
|
— |
| Liabilities |
811,800,000
USD
|
914,800,000
USD
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
246,100,000
USD
|
254,200,000
USD
|
— |
| Current liabilities |
256,100,000
USD
|
312,500,000
USD
|
— |
| Assets less current liabilities [abstract] |