Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-01-01 |
As at 2021-12-31 |
|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||
| Property, plant and equipment [abstract] | ||||
| Property, plant and equipment |
9,800,000
USD
|
1,100,000
USD
|
800,000
USD
|
— |
| Intangible assets and goodwill [abstract] | ||||
| Intangible assets and goodwill |
181,100,000
USD
|
172,400,000
USD
|
157,900,000
USD
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||||
| Investments in associates reported in separate financial statements |
16,200,000
USD
|
59,700,000
USD
|
120,100,000
USD
|
— |
| Trade and other receivables [abstract] | ||||
| Other receivables |
58,400,000
USD
|
30,000,000
USD
|
18,800,000
USD
|
— |
| Categories of financial assets [abstract] | ||||
| Financial assets |
2,455,500,000
USD
|
2,204,900,000
USD
|
2,048,100,000
USD
|
— |
| Cash and cash equivalents [abstract] | ||||
| Cash and cash equivalents |
756,900,000
USD
|
548,800,000
USD
|
517,700,000
USD
|
517,700,000
USD
|
| Miscellaneous assets [abstract] | ||||
| Interest receivable |
16,700,000
USD
|
11,300,000
USD
|
7,100,000
USD
|
— |
| Borrowings [abstract] | ||||
| Non-current portion of non-current borrowings |
446,600,000
USD
|
446,100,000
USD
|
445,700,000
USD
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | ||||
| Trade and other payables [abstract] | ||||
| Other payables |
80,600,000
USD
|
44,600,000
USD
|
37,400,000
USD
|
— |
| Issued capital [abstract] | ||||
| Issued capital |
122,000,000
USD
|
122,000,000
USD
|
122,000,000
USD
|
— |
| Retained earnings [abstract] | ||||
| Retained earnings |
182,400,000
USD
|
16,200,000
USD
|
67,900,000
USD
|
— |
| Net assets (liabilities) [abstract] | ||||
| Assets |
3,901,700,000
USD
|
3,523,900,000
USD
|
3,210,400,000
USD
|
— |
| Liabilities |
2,393,800,000
USD
|
2,197,800,000
USD
|
1,816,500,000
USD
|
— |
| Assets less current liabilities [abstract] |