Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||
| Intangible assets and goodwill [abstract] | ||||
| Intangible assets and goodwill |
5,654,000
USD
|
5,709,000
USD
|
— | — |
| Investments accounted for using equity method [abstract] | ||||
| Investments accounted for using equity method |
2,471,000
USD
|
2,508,000
USD
|
— | — |
| Trade and other non-current receivables [abstract] | ||||
| Non-current prepayments and non-current accrued income other than non-current contract assets [abstract] | ||||
| Non-current prepayments |
1,379,000
USD
|
1,291,000
USD
|
— | — |
| Non-current prepayments and non-current accrued income including non-current contract assets [abstract] | ||||
| Miscellaneous non-current assets [abstract] | ||||
| Non-current net defined benefit asset |
1,717,000
USD
|
1,260,000
USD
|
— | — |
| Non-current derivative financial assets |
648,000,000
USD
|
559,000,000
USD
|
— | — |
| Trade and other current receivables [abstract] | ||||
| Trade and other current receivables |
13,590,000
USD
|
13,204,000
USD
|
— | — |
| Categories of non-current financial assets [abstract] | ||||
| Non-current financial assets |
5,616,000
USD
|
3,441,000
USD
|
— | — |
| Categories of current financial assets [abstract] | ||||
| Current financial assets |
15,335,000
USD
|
29,224,000
USD
|
— | — |
| Classes of current inventories [abstract] | ||||
| Current inventories |
4,031,000
USD
|
3,814,000
USD
|
— | — |
| Classes of current inventories, alternative [abstract] | ||||
| Cash and cash equivalents [abstract] | ||||
| Cash and cash equivalents |
8,120,000
USD
|
9,641,000
USD
|
15,579,000
USD
|
13,987,000
USD
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | ||||
| Non-current assets or disposal groups classified as held for sale |
7,227,000
USD
|
1,064,000
USD
|
— | — |
| Miscellaneous current assets [abstract] | ||||
| Current derivative financial assets |
1,024,000
USD
|
1,378,000
USD
|
— | — |
| Classes of other provisions [abstract] | ||||
| Other provisions [abstract] | ||||
| Other non-current provisions |
12,927,000
USD
|
15,304,000
USD
|
— | — |
| Borrowings [abstract] | ||||
| Non-current portion of non-current borrowings |
19,361,000
USD
|
22,230,000
USD
|
— | — |
| Current borrowings and current portion of non-current borrowings [abstract] | ||||
| Current portion of non-current borrowings |
7,223,000
USD
|
5,996,000
USD
|
— | — |
| Non-current portion of non-current borrowings, by type [abstract] | ||||
| Trade and other current payables [abstract] | ||||
| Trade and other current payables |
11,110,000
USD
|
9,556,000
USD
|
— | — |
| Miscellaneous non-current liabilities [abstract] | ||||
| Non-current net defined benefit liability |
3,482,000
USD
|
3,925,000
USD
|
— | — |
| Non-current derivative financial liabilities |
1,958,000
USD
|
1,795,000
USD
|
— | — |
| Miscellaneous current liabilities [abstract] | ||||
| Current derivative financial liabilities |
833,000,000
USD
|
1,619,000
USD
|
— | — |
| Current dividend payables |
1,906,000
USD
|
2,649,000
USD
|
— | — |
| Net assets (liabilities) [abstract] | ||||
| Assets |
131,141,000
USD
|
143,580,000
USD
|
— | — |
| Liabilities |
88,761,000
USD
|
95,080,000
USD
|
— | — |
| Assets less current liabilities [abstract] |