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] | |||
| Property, plant and equipment |
386,400,000
USD
|
499,700,000
USD
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
660,200,000
USD
|
815,700,000
USD
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
26,400,000
USD
|
56,600,000
USD
|
— |
| Non-current derivative financial assets |
1,300,000
USD
|
–
USD
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
94,900,000
USD
|
138,900,000
USD
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
182,000,000
USD
|
186,100,000
USD
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
54,900,000
USD
|
84,600,000
USD
|
111,000,000
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 or as held for distribution to owners |
160,900,000
USD
|
–
USD
|
— |
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
10,700,000
USD
|
200,000
USD
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
414,700,000
USD
|
482,500,000
USD
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
2,700,000
USD
|
–
USD
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
135,400,000
USD
|
161,000,000
USD
|
— |
| Categories of non-current financial liabilities [abstract] | |||
| Non-current financial liabilities |
2,800,000
USD
|
4,000,000
USD
|
— |
| Categories of current financial liabilities [abstract] | |||
| Current financial liabilities |
3,300,000
USD
|
1,400,000
USD
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
8,900,000
USD
|
17,300,000
USD
|
— |
| Issued capital [abstract] | |||
| Issued capital |
52,300,000
USD
|
52,200,000
USD
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
450,800,000
USD
|
517,300,000
USD
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
1,627,000,000
USD
|
1,836,600,000
USD
|
— |
| Liabilities |
843,100,000
USD
|
935,600,000
USD
|
— |
| Assets (liabilities) |
783,900,000
USD
|
901,000,000
USD
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
349,500,000
USD
|
416,900,000
USD
|
— |
| Current liabilities |
173,500,000
USD
|
194,900,000
USD
|
— |
| Assets less current liabilities [abstract] |